Energy development is a field of endeavor focused on making available sufficient primary energy sources and secondary energy forms to meet the needs of society. These endeavors encompass those which provide for the production of conventional, alternative and renewable sources of energy, and for the recovery and reuse of energy that would otherwise be wasted. Energy conservation[note 2] and efficiency measures[note 3] reduce the impact of energy development, and can have benefits to society with changes in economic cost and with changes in the environmental effects.
Contemporary industrial societies use primary and secondary energy sources for transportation and the production of many manufactured goods. Also, large industrial populations have various generation and delivery services for energy distribution and end-user utilization.[note 4] This energy is used by people who can afford the cost to live under various climatic conditions through the use of heating, ventilation, and/or air conditioning. Level of use of external energy sources differs across societies, along with the convenience, levels of traffic congestion, pollution sources and availability of domestic energy sources.
Thousands of people in society are employed in the energy industry, of which subjectively influence and impact behaviors. The conventional industry comprises the petroleum industry[note 5] the gas industry,[note 6] the electrical power industry[note 7] the coal industry, and the nuclear power industry. New energy industries include the renewable energy industry, comprising alternative and sustainable manufacture, distribution, and sale of alternative fuels. While there is the development of new hydrocarbon sources, including deepwater/horizontal drilling and fracking, are contentiously underway, commitments to mitigate climate change are driving efforts to develop sources of alternative and renewable energy.
- 1 Types of energy
- 2 Fossil fuels
- 3 Nuclear
- 4 Renewable sources
- 5 Increased energy efficiency
- 6 Transmission
- 7 Storage
- 8 History of energy development
- 9 See also
- 10 References and citations
- 11 Sources
- 12 Journals
- 13 External links
Types of energy
Colloquially, and in non-scientific literature, the terms power,[note 8] fuels, and energy can be used as synonyms, but in the field of energy technology they possess different distinct meanings that are associated with them. An energy source is usually in the form of a closed system, the element that provides the energy by conversion from another energy form; However, the energy can be quantitative, the balance sheet is capable of containing open system energy transfers.[note 9] Illustrative of this can be the emanations from the sun, which with its nuclear fusion is the most important energy source for the Earth[note 10] and which provides its energy in the form of radiation.
The natural elements[note 11] of the material world exist in forms that can be converted into usable energy and are resources from which society can obtain energy to produce heat, light, and motion (among the many uses). According to their nature, the power plants can be classified into:
- Primary : They are found in nature: wind, water, solar,[note 12] wood, coal, oil, nuclear.
- Secondary : Are those obtained from primary energy sources: electricity, gas.
- renewable: When the energy source used is freely regenerated in a short period and there are practically limitless reserves; An example is the solar energy that is the source of energy from the sun, or the wind[note 13] used as an energy resource. Renewable energies are:
- nonrenewable: They are coming from energy limited sources on Earth in quantity and, therefore, are exhaustible. The non-renewable energy sources include, non-exclusively:
So, for example, shale gas is secondary non-renewable. Wind is a primary renewable.
The principle stated by Antoine Lavoisier on the conservation of matter applies to energy development:[note 17] "nothing is created." Thus any energy "production" is actually a recovery transformation of the forms of energy whose origin is that of the universe.
For example, a bicycle dynamo turns in part from the kinetic energy (speed energy) of the movement of the cyclist and converting it into electrical energy will transfer in particular to its lights producing light, that is to say light energy, via the heating of the filament of the bulb and therefore heat (thermal energy). But the kinetic energy of the rider is itself biochemical energy (the ATP muscle cells) derived from the chemical energy of sugars synthesized by plants who use light energy from the sun, which runs from the nuclear energy produced by fusion of atoms of hydrogen, the material itself constitute a form of energy, called "mass energy".
Fossil fuel (primary non-renewable fossil) sources burn coal or hydrocarbon fuels, which are the remains of the decomposition of plants and animals. There are three main types of fossil fuels: coal, petroleum, and natural gas. Another fossil fuel, liquefied petroleum gas (LPG), is principally derived from the production of natural gas. Heat from burning fossil fuel is used either directly for space heating and process heating, or converted to mechanical energy for vehicles, industrial processes, or electrical power generation.
Fossil energy is from recovered fossils (like brown coal, hard coal, peat, natural gas and crude oil) and are originated in degradated products of dead plants and animals. These fossil fuels are based on the carbon cycle and thus allow stored (historic solar) energy to be recycled today. In 2005, 81% were of the world's energy needs met from fossil sources. Biomass is also derived from wood and other organic wastes and modern remains. The technical development of fossil fuels in the 18th and 19th Century set the stage for the Industrial Revolution.
Fossil fuels make up the bulk of the world's current primary energy sources. The technology and infrastructure already exist for the use of fossil fuels. Petroleum energy density in terms of volume (cubic space) and mass (weight) ranks currently above that of alternative energy sources (or energy storage devices, like a battery). Fossil fuels are currently economical, and suitable for decentralized energy use.
Dependence on fossil fuels from regions or countries creates energy security risks for dependent countries. Oil dependence in particular has led to war, funding of radicals, monopolization, and socio-political instability. Fossil fuels are non-renewable, un-sustainable resources, which will eventually decline in production and become exhausted, with consequences to societies that remain dependent on them. Fossil fuels are actually slowly forming continuously, but are being consumed quicker than are formed.[note 18] Extracting fuels becomes increasingly extreme as society consumes the most accessible fuel deposits. Extraction in fuel mines get intensive and oil rigs drill deeper (going further out to sea). Extraction of fossil fuels results in environmental degradation, such as the strip mining and mountaintop removal of coal.
Fuel efficiency is a form of thermal efficiency, meaning the efficiency of a process that converts chemical potential energy contained in a carrier fuel into kinetic energy or work. The fuel economy is the energy efficiency of a particular vehicle, is given as a ratio of distance travelled per unit of fuel consumed. Weight-specific efficiency (efficiency per unit weight) may be stated for freight, and passenger-specific efficiency (vehicle efficiency per passenger). The inefficient atmospheric combustion (burning) of fossil fuels in vehicles, buildings, and power plants contributes to urban heat islands.
Conventional production of oil has peaked, conservatively, between 2007 to 2010.[note 19] In 2010, it was estimated that an investment in non-renewable resources of $8 trillion would be required to maintain current levels of production for 25 years. In 2010, governments subsidized fossil fuels by an estimated $500 billion a year. Fossil fuels are also a source of greenhouse gas emissions, leading to concerns about global warming if consumption is not reduced.
The combustion of fossil fuels leads to the release of pollution into the atmosphere. The fossil fuels are mainly based on organic carbon compounds. They are according to the IPCC the causes of the global warming. During the combustion with oxygen in the form of heat energy, carbon dioxide released. Depending on the composition and purity of the fossil fuel also results in other chemical compounds such as nitrogen oxides and soot and fine dust alternativey. Greenhouse gas emissions result from fossil fuel-based electricity generation. Typical megawatt coal plant produces billions of kilowatt hours per year.[note 20] From this generation, the carbon dioxide, sulfur dioxide, small airborne particles, nitrogen oxides (NOx) (ozone (smog)), carbon monoxide (CO), hydrocarbons, volatile organic compounds (VOC), mercury, arsenic, lead, cadmium, other heavy metals, and uranium traces are produced.
Nuclear power, or nuclear energy, is the use of exothermic nuclear processes, to generate useful heat and electricity. The term includes nuclear fission, nuclear decay and nuclear fusion. Presently the nuclear fission of elements in the actinide series of the periodic table produce the vast majority of nuclear energy in the direct service of humankind, with nuclear decay processes, primarily in the form of geothermal energy, and radioisotope thermoelectric generators, in niche uses making up the rest. Nuclear (fission) power stations, excluding the contribution from naval nuclear fission reactors, provided about 5.7% of the world's energy and 13% of the world's electricity in 2012. In 2013, the IAEA report that there are 437 operational nuclear power reactors, in 31 countries, although not every reactor is producing electricity. In addition, there are approximately 140 naval vessels using nuclear propulsion in operation, powered by some 180 reactors. As of 2013, attaining a net energy gain from sustained nuclear fusion reactions, excluding natural fusion power sources such as the Sun, remains an ongoing area of international physics and engineering research. More than 60 years after the first attempts, commercial fusion power production remains unlikely before 2050.
There is an ongoing debate about nuclear power. Proponents, such as the World Nuclear Association, the IAEA and Environmentalists for Nuclear Energy contend that nuclear power is a safe, sustainable energy source that reduces carbon emissions. Opponents, such as Greenpeace International and NIRS, contend that nuclear power poses many threats to people and the environment.
Nuclear power plant accidents include the Chernobyl disaster (1986), Fukushima Daiichi nuclear disaster (2011), and the Three Mile Island accident (1979). There have also been some nuclear submarine accidents. In terms of lives lost per unit of energy generated, analysis has determined that nuclear power has caused less fatalities per unit of energy generated than the other major sources of energy generation. Energy production from coal, petroleum, natural gas and hydropower has caused a greater number of fatalities per unit of energy generated due to air pollution and energy accident effects. However, the economic costs of nuclear power accidents is high, and meltdowns can take decades to clean up. The human costs of evacuations of affected populations and lost livelihoods is also significant.
Along with other sustainable energy sources, nuclear power is a low carbon power generation method of producing electricity, with an analysis of the literature on its total life cycle emission intensity finding that it is similar to other renewable sources in a comparison of greenhouse gas(GHG) emissions per unit of energy generated. With this translating into, from the beginning of nuclear power station commercialization in the 1970s, having prevented the emission of approximately 64 gigatonnes of carbon dioxide equivalent(GtCO2-eq) greenhouse gases, gases that would have otherwise resulted from the burning of fossil fuels in thermal power stations.
As of 2012, according to the IAEA, worldwide there were 68 civil nuclear power reactors under construction in 15 countries, approximately 28 of which in the Peoples Republic of China (PRC), with the most recent nuclear power reactor, as of May 2013, to be connected to the electrical grid, occurring on February 17, 2013 in Hongyanhe Nuclear Power Plant in the PRC. In the USA, two new Generation III reactors are under construction at Vogtle. U.S. nuclear industry officials expect five new reactors to enter service by 2020, all at existing plants. In 2013, four aging, uncompetitive, reactors were permanently closed.
Japan's 2011 Fukushima Daiichi nuclear accident, which occurred in a reactor design from the 1960s, prompted a rethink of nuclear safety and nuclear energy policy in many countries. Germany decided to close all its reactors by 2022, and Italy has banned nuclear power. Following Fukushima, in 2011 the International Energy Agency halved its estimate of additional nuclear generating capacity to be built by 2035.
The economics of new nuclear power plants is a controversial subject, since there are diverging views on this topic, and multi-billion dollar investments ride on the choice of an energy source. Nuclear power plants typically have high capital costs for building the plant, but low direct fuel costs.
In recent years there has been a slowdown of electricity demand growth and financing has become more difficult, which has an impact on large projects such as nuclear reactors, with very large upfront costs and long project cycles which carry a large variety of risks. In Eastern Europe, a number of long-established projects are struggling to find finance, notably Belene in Bulgaria and the additional reactors at Cernavoda in Romania, and some potential backers have pulled out. Where cheap gas is available and its future supply relatively secure, this also poses a major problem for nuclear projects.
Analysis of the economics of nuclear power must take into account who bears the risks of future uncertainties. To date all operating nuclear power plants were developed by state-owned or regulated utility monopolies where many of the risks associated with construction costs, operating performance, fuel price, and other factors were borne by consumers rather than suppliers. Many countries have now liberalized the electricity market where these risks, and the risk of cheaper competitors emerging before capital costs are recovered, are borne by plant suppliers and operators rather than consumers, which leads to a significantly different evaluation of the economics of new nuclear power plants.
Two of the four EPRs under construction (in Finland and France) are significantly behind schedule and substantially over cost. Following the 2011 Fukushima Daiichi nuclear disaster, costs are likely to go up for currently operating and new nuclear power plants, due to increased requirements for on-site spent fuel management and elevated design basis threats.
Nuclear power debate
The nuclear power debate is about the controversy which has surrounded the deployment and use of nuclear fission reactors to generate electricity from nuclear fuel for civilian purposes. The debate about nuclear power peaked during the 1970s and 1980s, when it "reached an intensity unprecedented in the history of technology controversies", in some countries.
Proponents of nuclear energy argue that nuclear power is a sustainable energy source which reduces carbon emissions and can increase energy security if its use supplants a dependence on imported fuels. Proponents advance the notion that nuclear power produces virtually no air pollution, in contrast to the chief viable alternative of fossil fuel. Proponents also believe that nuclear power is the only viable course to achieve energy independence for most Western countries. They emphasize that the risks of storing waste are small and can be further reduced by using the latest technology in newer reactors, and the operational safety record in the Western world is excellent when compared to the other major kinds of power plants.
Opponents say that nuclear power poses numerous threats to people and the environment and point to studies in the literature that question if it will ever be a sustainable energy source. These threats include health risks and environmental damage from uranium mining, processing and transport, the risk of nuclear weapons proliferation or sabotage, and the unsolved problem of radioactive nuclear waste. They also contend that reactors themselves are enormously complex machines where many things can and do go wrong, and there have been many serious nuclear accidents. Critics do not believe that these risks can be reduced through new technology. They argue that when all the energy-intensive stages of the nuclear fuel chain are considered, from uranium mining to nuclear decommissioning, nuclear power is not a low-carbon electricity source.
Renewable energy is generally defined as energy that comes from resources which are naturally replenished on a human timescale such as sunlight, wind, rain, tides, waves and geothermal heat. Renewable energy replaces conventional fuels in four distinct areas: electricity generation, hot water/space heating, motor fuels, and rural (off-grid) energy services.
About 16% of global final energy consumption presently comes from renewable resources, with 10%  of all energy from traditional biomass, mainly used for heating, and 3.4% from hydroelectricity. New renewables (small hydro, modern biomass, wind, solar, geothermal, and biofuels) account for another 3% and are growing rapidly. At the national level, at least 30 nations around the world already have renewable energy contributing more than 20% of energy supply. National renewable energy markets are projected to continue to grow strongly in the coming decade and beyond. Wind power, for example, is growing at the rate of 30% annually, with a worldwide installed capacity of 282,482 megawatts (MW) at the end of 2012.
Renewable energy resources exist over wide geographical areas, in contrast to other energy sources, which are concentrated in a limited number of countries. Rapid deployment of renewable energy and energy efficiency is resulting in significant energy security, climate change mitigation, and economic benefits. In international public opinion surveys there is strong support for promoting renewable sources such as solar power and wind power.
While many renewable energy projects are large-scale, renewable technologies are also suited to rural and remote areas and developing countries, where energy is often crucial in human development. United Nations' Secretary-General Ban Ki-moon has said that renewable energy has the ability to lift the poorest nations to new levels of prosperity.
Wind (primary renewable natural) power harnesses the power of the wind to propel the blades of wind turbines. These turbines cause the rotation of magnets, which creates electricity. Wind towers are usually built together on wind farms. Wind power is growing at the rate of 30% annually, with a worldwide installed capacity of 282,482 megawatts (MW) at the end of 2012. Energy production is more than 450 TWh, which is about 2.5% of worldwide electricity usage.
Wind power is widely used in Europe, Asia, and the United States. Several countries have achieved relatively high levels of wind power penetration, such as 21% of stationary electricity production in Denmark, 18% in Portugal, 16% in Spain, 14% in Ireland, and 9% in Germany in 2010. By 2011, at times over 50% of electricity in Germany and Spain came from wind and solar power. As of 2011, 83 countries around the world are using wind power on a commercial basis.
Many of the largest operational onshore wind farms are located in the USA:
|Alta (Oak Creek-Mojave)||1,320||United States|||
|Jaisalmer Wind Park||1,064||India|||
|Capricorn Ridge Wind Farm||662.5||United States|||
|Fântânele-Cogealac Wind Farm||600||Romania|||
|Fowler Ridge Wind Farm||599.8||United States|||
|Horse Hollow Wind Energy Center||735.5||United States|||
|Roscoe Wind Farm||781.5||United States|||
As of August 2013 the London Array in the United Kingdom is the largest offshore wind farm in the world at 630 MW. This is followed by the Greater Gabbard Wind Farm (504 MW), also in the UK. The Gwynt y Môr wind farm (576 MW) is the largest project currently under construction.
Hydroelectricity is the term referring to electricity generated by hydropower; the production of electrical power through the use of the gravitational force of falling or flowing water. It is the most widely used form of renewable energy, accounting for 16 percent of global electricity generation – 3,427 terawatt-hours of electricity production in 2010, and is expected to increase about 3.1% each year for the next 25 years.
Hydropower is produced in 150 countries, with the Asia-Pacific region generating 32 percent of global hydropower in 2010. China is the largest hydroelectricity producer, with 721 terawatt-hours of production in 2010, representing around 17 percent of domestic electricity use. There are now three hydroelectricity plants larger than 10 GW: the Three Gorges Dam in China, Itaipu Dam across the Brazil/Paraguay border, and Guri Dam in Venezuela.
The cost of hydroelectricity is relatively low, making it a competitive source of renewable electricity. The average cost of electricity from a hydro plant larger than 10 megawatts is 3 to 5 U.S. cents per kilowatt-hour. Hydro is also a flexible source of electricity since plants can be ramped up and down very quickly to adapt to changing energy demands. However, damming interrupts the flow of rivers and can harm local ecosystems, and building large dams and reservoirs often involves displacing people and wildlife. Once a hydroelectric complex is constructed, the project produces no direct waste, and has a considerably lower output level of the greenhouse gas carbon dioxide (CO
2) than fossil fuel powered energy plants.
Solar energy, radiant light and heat from the sun, is harnessed using a range of ever-evolving technologies such as solar heating, solar photovoltaics, solar thermal electricity, solar architecture and artificial photosynthesis.
Solar technologies are broadly characterized as either passive solar or active solar depending on the way they capture, convert and distribute solar energy. Active solar techniques include the use of photovoltaic panels and solar thermal collectors to harness the energy. Passive solar techniques include orienting a building to the Sun, selecting materials with favorable thermal mass or light dispersing properties, and designing spaces that naturally circulate air.
In 2011, the International Energy Agency said that "the development of affordable, inexhaustible and clean solar energy technologies will have huge longer-term benefits. It will increase countries’ energy security through reliance on an indigenous, inexhaustible and mostly import-independent resource, enhance sustainability, reduce pollution, lower the costs of mitigating climate change, and keep fossil fuel prices lower than otherwise. These advantages are global. Hence the additional costs of the incentives for early deployment should be considered learning investments; they must be wisely spent and need to be widely shared".
Photovoltaics (PV) is a method of generating electrical power by converting solar radiation into direct current electricity using semiconductors that exhibit the photovoltaic effect. Photovoltaic power generation employs solar panels composed of a number of solar cells containing a photovoltaic material. Materials presently used for photovoltaics include monocrystalline silicon, polycrystalline silicon, amorphous silicon, cadmium telluride, and copper indium gallium selenide/sulfide. Due to the increased demand for renewable energy sources, the manufacturing of solar cells and photovoltaic arrays has advanced considerably in recent years.
Solar photovoltaics is a sustainable energy source. By the end of 2011, a total of 71.1 GW had been installed, sufficient to generate 85 TWh/year. And by end of 2012, the 100 GW installed capacity milestone was achieved. Solar photovoltaics is now, after hydro and wind power, the third most important renewable energy source in terms of globally installed capacity. More than 100 countries use solar PV. Installations may be ground-mounted (and sometimes integrated with farming and grazing) or built into the roof or walls of a building (either building-integrated photovoltaics or simply rooftop).
Driven by advances in technology and increases in manufacturing scale and sophistication, the cost of photovoltaics has declined steadily since the first solar cells were manufactured, and the levelised cost of electricity (LCOE) from PV is competitive with conventional electricity sources in an expanding list of geographic regions. Net metering and financial incentives, such as preferential feed-in tariffs for solar-generated electricity, have supported solar PV installations in many countries. With current technology, photovoltaics recoup the energy needed to manufacture them in 3 to 4 years. Anticipated technology would reduce time needed to recoup the energy to 1 to 2 years.
A biofuel is a fuel that contains energy from geologically recent carbon fixation. These fuels are produced from living organisms. Examples of this carbon fixation occur in plants and microalgae. These fuels are made by a biomass conversion (biomass refers to recently living organisms, most often referring to plants or plant-derived materials). This biomass can be converted to convenient energy containing substances in three different ways: thermal conversion, chemical conversion, and biochemical conversion. This biomass conversion can result in fuel in solid, liquid, or gas form. This new biomass can be used for biofuels. Biofuels have increased in popularity because of rising oil prices and the need for energy security.
Bioethanol is an alcohol made by fermentation, mostly from carbohydrates produced in sugar or starch crops such as corn or sugarcane. Cellulosic biomass, derived from non-food sources, such as trees and grasses, is also being developed as a feedstock for ethanol production. Ethanol can be used as a fuel for vehicles in its pure form, but it is usually used as a gasoline additive to increase octane and improve vehicle emissions. Bioethanol is widely used in the USA and in Brazil. Current plant design does not provide for converting the lignin portion of plant raw materials to fuel components by fermentation.
Biodiesel is made from vegetable oils and animal fats. Biodiesel can be used as a fuel for vehicles in its pure form, but it is usually used as a diesel additive to reduce levels of particulates, carbon monoxide, and hydrocarbons from diesel-powered vehicles. Biodiesel is produced from oils or fats using transesterification and is the most common biofuel in Europe.
In 2010, worldwide biofuel production reached 105 billion liters (28 billion gallons US), up 17% from 2009, and biofuels provided 2.7% of the world's fuels for road transport, a contribution largely made up of ethanol and biodiesel. Global ethanol fuel production reached 86 billion liters (23 billion gallons US) in 2010, with the United States and Brazil as the world's top producers, accounting together for 90% of global production. The world's largest biodiesel producer is the European Union, accounting for 53% of all biodiesel production in 2010. As of 2011, mandates for blending biofuels exist in 31 countries at the national level and in 29 states or provinces. The International Energy Agency has a goal for biofuels to meet more than a quarter of world demand for transportation fuels by 2050 to reduce dependence on petroleum and coal.
Geothermal energy is thermal energy generated and stored in the Earth. Thermal energy is the energy that determines the temperature of matter. The geothermal energy of the Earth's crust originates from the original formation of the planet (20%) and from radioactive decay of minerals (80%). The geothermal gradient, which is the difference in temperature between the core of the planet and its surface, drives a continuous conduction of thermal energy in the form of heat from the core to the surface. The adjective geothermal originates from the Greek roots γη (ge), meaning earth, and θερμος (thermos), meaning hot.
Earth's internal heat is thermal energy generated from radioactive decay and continual heat loss from Earth's formation. Temperatures at the core-mantle boundary may reach over 4000 °C (7,200 °F). The high temperature and pressure in Earth's interior cause some rock to melt and solid mantle to behave plastically, resulting in portions of mantle convecting upward since it is lighter than the surrounding rock. Rock and water is heated in the crust, sometimes up to 370 °C (700 °F).
From hot springs, geothermal energy has been used for bathing since Paleolithic times and for space heating since ancient Roman times, but it is now better known for electricity generation. Worldwide, 11,400 megawatts (MW) of geothermal power is online in 24 countries in 2012. An additional 28 gigawatts of direct geothermal heating capacity is installed for district heating, space heating, spas, industrial processes, desalination and agricultural applications in 2010.
Geothermal power is cost effective, reliable, sustainable, and environmentally friendly, but has historically been limited to areas near tectonic plate boundaries. Recent technological advances have dramatically expanded the range and size of viable resources, especially for applications such as home heating, opening a potential for widespread exploitation. Geothermal wells release greenhouse gases trapped deep within the earth, but these emissions are much lower per energy unit than those of fossil fuels. As a result, geothermal power has the potential to help mitigate global warming if widely deployed in place of fossil fuels.
The Earth's geothermal resources are theoretically more than adequate to supply humanity's energy needs, but only a very small fraction may be profitably exploited. Drilling and exploration for deep resources is very expensive. Forecasts for the future of geothermal power depend on assumptions about technology, energy prices, subsidies, and interest rates. Pilot programs like EWEB's customer opt in Green Power Program  show that customers would be willing to pay a little more for a renewable energy source like geothermal. But as a result of government assisted research and industry experience, the cost of generating geothermal power has decreased by 25% over the past two decades. In 2001, geothermal energy cost between two and ten US cents per kWh.
100% renewable energy
The incentive to use 100% renewable energy, for electricity, transport, or even total primary energy supply globally, has been motivated by global warming and other ecological as well as economic concerns. Renewable energy use has grown much faster than anyone anticipated. The Intergovernmental Panel on Climate Change has said that there are few fundamental technological limits to integrating a portfolio of renewable energy technologies to meet most of total global energy demand. At the national level, at least 30 nations around the world already have renewable energy contributing more than 20% of energy supply. Also, Professors S. Pacala and Robert H. Socolow have developed a series of “stabilization wedges” that can allow us to maintain our quality of life while avoiding catastrophic climate change, and "renewable energy sources," in aggregate, constitute the largest number of their "wedges." 
Mark Z. Jacobson says producing all new energy with wind power, solar power, and hydropower by 2030 is feasible and existing energy supply arrangements could be replaced by 2050. Barriers to implementing the renewable energy plan are seen to be "primarily social and political, not technological or economic". Jacobson says that energy costs with a wind, solar, water system should be similar to today's energy costs.
Similarly, in the United States, the independent National Research Council has noted that “sufficient domestic renewable resources exist to allow renewable electricity to play a significant role in future electricity generation and thus help confront issues related to climate change, energy security, and the escalation of energy costs … Renewable energy is an attractive option because renewable resources available in the United States, taken collectively, can supply significantly greater amounts of electricity than the total current or projected domestic demand." .
Critics of the "100% renewable energy" approach include Vaclav Smil and James E. Hansen. Smil and Hansen are concerned about the variable output of solar and wind power, but many other scientists and engineers have analysed this situation and said that the electricity grid can cope.
Increased energy efficiency
Although increasing the efficiency of energy use is not energy development per se, it may be considered under the topic of energy development since it makes existing energy sources available to do work.:22
Efficient energy use, simply called energy efficiency, is the goal of efforts to reduce the amount of energy required to provide products and services. For example, insulating a home allows a building to use less heating and cooling energy to achieve and maintain a comfortable temperature. Installing fluorescent lights or natural skylights reduces the amount of energy required to attain the same level of illumination compared to using traditional incandescent light bulbs. Compact fluorescent lights use two-thirds less energy and may last 6 to 10 times longer than incandescent lights. Improvements in energy efficiency are most often achieved by adopting an efficient technology or production process.
There are various motivations to improve energy efficiency. Reducing energy use reduces energy costs and may result in a financial cost saving to consumers if the energy savings offset any additional costs of implementing an energy efficient technology. Reducing energy use is also seen as a key solution to the problem of reducing emissions. According to the International Energy Agency, improved energy efficiency in buildings, industrial processes and transportation could reduce the world's energy needs in 2050 by one third, and help control global emissions of greenhouse gases.
Energy efficiency and renewable energy are said to be the twin pillars of sustainable energy policy. In many countries energy efficiency is also seen to have a national security benefit because it can be used to reduce the level of energy imports from foreign countries and may slow down the rate at which domestic energy resources are depleted.
While new sources of energy are only rarely discovered or made possible by new technology, distribution technology continually evolves. The use of fuel cells in cars, for example, is an anticipated delivery technology. This section presents the various delivery technologies that have been important to historic energy development. They all rely in way on the energy sources listed in the previous section.
Shipping and pipelines
Shipping is a flexible delivery technology that is used in the whole range of energy development regimes from primitive to highly advanced. Currently, coal, petroleum and their derivatives are delivered by shipping via boat, rail, or road. Petroleum and natural gas may also be delivered via pipeline and coal via a Slurry pipeline. Refined hydrocarbon fuels such as gasoline and LPG may also be delivered via aircraft. Natural gas pipelines must maintain a certain minimum pressure to function correctly. Ethanol's corrosive properties make it harder to build ethanol pipelines. The higher costs of ethanol transportation and storage are often prohibitive. Geomagnetically induced currents, seen as interfering with the normal operation of long buried pipeline systems, are a manifestation at ground level of space weather that occur due to time-varying ionospheric source fields and the conductivity of the Earth.
Wired energy transfer
Electricity grids are the networks used to transmit and distribute power from production source to end user, when the two may be hundreds of kilometres away. Sources include electrical generation plants such as a nuclear reactor, coal burning power plant, etc. A combination of sub-stations, transformers, towers, cables, and piping are used to maintain a constant flow of electricity. Grids may suffer from transient blackouts and brownouts, often due to weather damage. During certain extreme space weather events solar wind can interfere with transmissions. Grids also have a predefined carrying capacity or load that cannot safely be exceeded. When power requirements exceed what's available, failures are inevitable. To prevent problems, power is then rationed.
Industrialised countries such as Canada, the US, and Australia are among the highest per capita consumers of electricity in the world, which is possible thanks to a widespread electrical distribution network. The US grid is one of the most advanced, although infrastructure maintenance is becoming a problem. CurrentEnergy provides a realtime overview of the electricity supply and demand for California, Texas, and the Northeast of the US. African countries with small scale electrical grids have a correspondingly low annual per capita usage of electricity. One of the most powerful power grids in the world supplies power to the state of Queensland, Australia.
Wireless energy transfer
Wireless energy transfer is a process whereby electrical energy is transmitted from a power source to an electrical load that does not have a built-in power source, without the use of interconnecting wires.
All forms of energy are either potential energy (e.g. Chemical, gravitational, electrical energy, temperature differential, latent heat, etc.) or kinetic energy (e.g. momentum). Some technologies provide only short-term energy storage, and others can be very long-term such as power to gas using hydrogen or methane and the storage of heat or cold between opposing seasons in deep aquifers or bedrock. A wind-up clock stores potential energy (in this case mechanical, in the spring tension), a battery stores readily convertible chemical energy to operate a mobile phone, and a hydroelectric dam stores energy in a reservoir as gravitational potential energy. Ice storage tanks store ice (thermal energy in the form of latent heat) at night to meet peak demand for cooling. Fossil fuels such as coal and gasoline store ancient energy derived from sunlight by organisms that later died, became buried and over time were then converted into these fuels. Even food (which is made by the same process as fossil fuels) is a form of energy stored in chemical form.
History of energy development
Since prehistory, when humanity discovered fire to warm up and roast food, through the Middle Ages in which populations built windmills to grind the wheat, until the modern era in which nations can get electricity splitting the atom. Man has sought endlessly for energy sources[note 21] from which to draw profit, which have been the fossil fuels, on one hand the coal to fuel the steam engines run industrial rails as well as maintain households, and secondly, the oil and its derivatives in the industry and transportation (primarily automotive), although have lived with smaller-scale exploitation of wind power, hydro and biomass. This model of development, however, is based on the depletion of fossil resources from periods of millions years without possibility for replacement as would be required to maintain. The search for energy sources that are inexhaustible and utilization by industrialized countries to strengthen their national economies by reducing its dependence on fossil fuels,[note 22] has led to the adoption of nuclear energy and those with sufficient water resources, the intensive hydraulic use of their waterways.
Since the beginning of the Industrial Revolution, the question of the future of energy supplies has been of interest. In 1865, William Stanley Jevons published The Coal Question in which he saw that the reserves of coal were being depleted and that oil was an ineffective replacement. In 1914, U.S. Bureau of Mines stated that the total production was 5.7 billion barrels (910,000,000 m3). In 1956, Geophysicist M. King Hubbert deduces that U.S. oil production will peak between 1965 and 1970 (peaked in 1971) and that oil production will peak "within half a century" on the basis of 1956 data.[note 23] In 1989, predicted peak by Colin Campbell In 2004, OPEC estimated, with substantial investments, it would nearly double oil output by 2025
The environmental movement has emphasized sustainability of energy use and development. Renewable energy is sustainable in its production; the available supply will not be diminished for the foreseeable future - millions or billions of years. "Sustainability" also refers to the ability of the environment to cope with waste products, especially air pollution. Sources which have no direct waste products (such as wind, solar, and hydropower) are brought up on this point. With global demand for energy growing, the need to adopt various energy sources is growing. Energy conservation is an alternative or complementary process to energy development. It reduces the demand for energy by using it efficiently.
Some observers contend that idea of "energy independence" is an unrealistic[note 24] and opaque concept. The alternative offer of "energy resilience" is a goal aligned with economic, security, and energy realities. The notion of resilience in energy was detailed in the 1982 book Brittle Power: Energy Strategy for National Security. The authors argued that simply switching to domestic energy would not be secure inherently because the true weakness is the interdependent and vulnerable energy infrastructure of the United States. Key aspects such as gas lines and the electrical power grid are centralized and easily susceptible to disruption. They conclude that a "resilient energy supply" is necessary for both national security and the environment. They recommend a focus on energy efficiency and renewable energy that is decentralized.
In 2008, former Intel Corporation Chairman and CEO Andrew Grove looked to energy resilience, arguing that complete independence is unfeasible given the global market for energy. He describes energy resilience as the ability to adjust to interruptions in the supply of energy. To that end, he suggests the U.S. make greater use of electricity. Electricity can be produced from a variety of sources. A diverse energy supply will be less impacted by the disruption in supply of any one source. He reasons that another feature of electrification is that electricity is "sticky" – meaning the electricity produced in the U.S. is to stay there because it cannot be transported overseas. According to Grove, a key aspect of advancing electrification and energy resilience will be converting the U.S. automotive fleet from gasoline-powered to electric-powered. This, in turn, will require the modernization and expansion of the electrical power grid. As organizations such as the Reform Institute have pointed out, advancements associated with the developing smart grid would facilitate the ability of the grid to absorb vehicles en masse connecting to it to charge their batteries.
Present and Future
Extrapolations from current knowledge to the future offer a choice of energy futures. Predictions parallel the Malthusian catastrophe hypothesis. Numerous are complex models based scenarios as pioneered by Limits to Growth. Modeling approaches offer ways to analyze diverse strategies, and hopefully find a road to rapid and sustainable development of humanity. Short term energy crises are also a concern of energy development. Extrapolations lack plausibility, particularly when they predict a continual increase in oil consumption.
Energy production usually requires an energy investment. Drilling for oil or building a wind power plant requires energy. The fossil fuel resources (see above) that are left are often increasingly difficult to extract and convert. They may thus require increasingly higher energy investments. If investment is greater than the energy produced, than the resource; It is no longer an effective energy source.[note 25] This means that resources, the wasteful ones, are not used effectively for energy production.[note 26] Such resources can be exploited economically in order to produce raw materials;[note 27] They then become ordinary mining reserves, economically recoverable are not a positive energy sources. New technology may ameliorate this problem if it can lower the energy investment required to extract and convert the resources, although ultimately basic physics sets limits that cannot be exceeded.
Between 1950 and 1984, as the Green Revolution transformed agriculture around the globe, world grain production increased by 250%. The energy for the Green Revolution was provided by fossil fuels in the form of fertilizers (natural gas), pesticides (oil), and hydrocarbon fueled irrigation. The peaking of world hydrocarbon production (peak oil) may lead to significant changes, and require sustainable methods of production. One vision of a sustainable energy future involves all human structures on the earth's surface (i.e., buildings, vehicles and roads) doing artificial photosynthesis (using sunlight to split water as a source of hydrogen and absorbing carbon dioxide to make fertilizer) efficiently than plants.
With contemporary space industry's economic activity and the related private spaceflight, with the manufacturing industries, that go into Earth's orbit or beyond, delivering them to those regions will require further energy development. Commercialization of space includes satellite navigation systems, satellite television and satellite radio; investments estimated to be $50.8 billion. There are the spaceports of Sweden's gateway, Curaçao's gateway,[note 28] Malaysia's gateway, and America's gateway[note 29] that plans to make personal and commercial suborbital spaceflight for space tourism, space hubs,[note 30] space research, and science education, in-addition to contribute to Earth-based cross-industry innovation. Researchers have contemplated space-based solar power for collecting solar power in space for use on Earth.[note 31][note 32] Space-based solar power only differ from solar and other similar radiant energy collection methods in that the means used to collect energy would reside on an orbiting satellite instead of on Earth's surface. Some projected benefits of such a system are a higher collection rate and a longer collection period due to the lack of a diffusing and refracting atmosphere and nighttime in space.[note 33]
- Energy policy, Energy policy of the United States, Energy policy of China, Energy policy of India, Energy policy of the European Union, Energy policy of the United Kingdom, Energy policy of Russia, Energy policy of Brazil, Energy policy of Canada
- Seasonal thermal energy storage (Interseasonal thermal energy storage), Geomagnetically induced current, Energy harvesting
- Raw material, Material, Biomaterial, Commodity, Materials science, Recycling, Upcycling, Downcycling
- Background radiation, Energy policy of the Soviet Union, Energy Industry Liberalization and Privatization (Thailand)
References and citations
- Also known as heat loss inefficiency
- See also: Fuel efficiency and Energy efficiency in transportation
- See also: Energy conversion efficiency
- For small-scale generation, see: Microgeneration.
- Including oil companies, petroleum refiners, fuel transport and end-user sales at gas stations
- Including natural gas extraction, and coal gas manufacture, as well as distribution and sales
- Including electricity generation, electric power distribution and sales
- Such as the physical jargon of "power", can be seen in the following:
- See: thermodynamics open system
- Providing the day and the habitable zone the Earth is in.
- See also: Matter and Energy
- Or those pertaining to the cosmos.
- See also: velocity of wind
- petroleum products (fats), Hydrogenated vegetable oil (vegetable shortening), Brown grease, and Yellow grease
- human, donkey, mule, elephant.
- from shale slate
- Or, moreover, the mass and energy coupling, as Albert Einstein states in the equivalence between these two concepts in his formula, .
- See: Oil reserves, Petroleum formation, and Pyrolysis.
- More liberally, oil has or will peak between 2010 to 2025. One out of several estimations state that there will be no peak. The timing of worldwide peak oil production is being actively debated, but may have already happened in countries. For more, see: Congressional Record, Volume 151-Part 19: November 8, 2005 to November 16, 2005 (Pages 25297 to 26552). Government Printing Office, 2010. p26524-26525.
- About 10 million kilowatt hours per day; Roughly, 420000 kilowatt hours per hour.
- All terrestrial energy sources except nuclear, geothermal and tidal are from current solar isolation or from fossil remains of plant and animal life that relied directly and indirectly upon sunlight, respectively. Ultimately, solar energy itself is the result of the Sun's nuclear fusion. Geothermal power from hot, hardened rock above the magma of the Earth's core is the result of the decay of radioactive materials present beneath the Earth's crust, and nuclear fission relies on man-made fission of heavy radioactive elements in the Earth's crust; in both cases these elements were produced in supernova explosions before the formation of the solar system.
- Concentrated in foreign territories after the exploitation and exhaustion of their own resource.
- See Hubbert peak theory.
- Said in relation with Liquid metal fast breeder reactor. For more, see: United States. Congress. Senate. Committee on Appropriations. U.S. Government Printing Office, 1975. Page 7349.
- See: Energy returned on energy invested and Fuel efficiency.
- See: Waste minimisation
- For plastics, fertilizers, etc.
- Having the Lynx rocketplane, Insel Air, and Dutch Antilles Express.
- Having Virgin Galactic, SpaceX, UP Aerospace, and Armadillo Aerospace.
- See also: orbital station
- Using solar power satellites and satellite power systems, such as the electrodynamic tether.
- Space-based solar power has been in research since the early 1970s.
- Though, Earth based receiving structures of radiant electromotive forces are not beyond conception.
- See also: Lunar space elevator and Lunar outpost
- The Federal nonnuclear energy research and development act (Public Law 93-577) section 11, environmental evaluation: report to the President and Congress. By United States Environmental Protection Agency. Office of Environmental Engineering and Technology.
- The Social impacts of energy development on national parks: final report By United States National Park Service, University of Denver. Center for Community Change. The National Park Service, U.S. Dept. of the Interior, 1984.
- Assessment of Energy Resource Development Impact on Water Quality, Volume 1. By Susan M. Melancon, Terry S. Michaud, Robert William Thomas. Environmental Monitoring and Support Laboratory, 1979.
- Resources for the twenty-first century: proceedings of the international centennial symposium of the United States Geological Survey, held at Reston, Virginia, October 14–19, 1979 . By Frank C. Whitmore, Mary Ellen Williams, U.S. Geological Survey.
- The Homeowner's Guide to Renewable Energy: Achieving Energy Independence. By Dan Chiras. New Society Publishers, Jul 5, 2011.
- Renewable Energy Sources for Sustainable Development. By Narendra Singh Rathore, N. L. Panwar. New India Publishing, Jan 1, 2007
- Renewable Energy Sources and Climate Change Mitigation: Summary for Policymakers and Technical Summary: Special Report of the Intergovernmental Panel on Climate Change. Cambridge University Press, 2011.
- Solar Energy and Nonfossil Fuel Research. By United States. Cooperative State Research Service, Smithsonian Science Information Exchange. The Department, 1981.
- Final Report of the Task Force on the Availability of Federally Owned Mineral Lands, Volumes 1-2. By United States. Task Force on the Availability of Federally Owned Mineral Lands.
- Hydrocarbon Bioremediation, Volume 2 edited by Robert E. Hinchee
- Exploitation of Hydrocarbon Resources: New Solutions in Energy Supply : Overview 1995-1998. By European Commission, Directorate-General for Energy DG XVII, 1999.
- International Energy Agency: Key World Energy Statistics 2007. S. 6
- Energy Security and Climate Policy: Assessing Interactions. p125
- Energy Security: Economics, Politics, Strategies, and Implications. Edited by Carlos Pascual, Jonathan Elkind. p210
- Geothermal Energy Resources for Developing Countries. By D. Chandrasekharam, J. Bundschuh. p91
- Congressional Record, V. 153, PT. 2, January 18, 2007 to February 1, 2007 edited by U S Congress, Congress (U.S.). p 1618
- India s Energy Security. Edited by Ligia Noronha, Anant Sudarshan.
- National security, safety, technology, and employment implications of increasing CAFE standards : hearing before the Committee on Commerce, Science, and Transportation, United States Senate, One Hundred Seventh Congress, second session, January 24, 2002. DIANE Publishing. p10
- Ending our-Dependence on Oil - American Security Project. americansecurityproject.org
- Energy Dependency, Politics and Corruption in the Former Soviet Union. By Margarita M. Balmaceda. Psychology Press, Dec 6, 2007.
- Oil-Led Development: Social, Political, and Economic Consequences. Terry Lynn Karl. Stanford University. Stanford, California, United States.
- Peaking of World Oil Production: Impacts, Mitigation, and Risk Management. Was at: www.pppl.gov/polImage.cfm?doc_Id=44&size_code=Doc
- "Big Rig Building Boom". Rigzone.com. 2006-04-13. Archived from the original on 2007-10-21. Retrieved 2008-01-18.
- "Heat Island Group Home Page". Lawrence Berkeley National Laboratory. 2000-08-30. Retrieved 2008-01-19.
- Has the World Already Passed “Peak Oil”?
- ScienceDaily.com (Apr. 22, 2010) "Fossil-Fuel Subsidies Hurting Global Environment, Security, Study Finds"
- Intergovernmental Panel on Climate Change (2007): IPCC Fourth Assessment Report - Working Group I Report on "The Physical Science Basis".
- How much electricity does a typical nuclear power plant generate? - FAQ - U.S. Energy Information Administration (EIA)
- "Environmental impacts of coal power: air pollution". Union of Concerned Scientists. 08/18/05. Retrieved 2008-01-18.
- NRDC: There Is No Such Thing as "Clean Coal"
- "Nuclear Energy". Energy Education is an interactive curriculum supplement for secondary-school science students, funded by the U. S. Department of Energy and the Texas State Energy Conservation Office (SECO). U. S. Department of Energy and the Texas State Energy Conservation Office (SECO). July 2010. Retrieved 2010-07-10.
- Key World Energy Statistics 2012 (PDF). International Energy Agency. 2012. Retrieved 2012-12-17.
- "PRIS - Home". Iaea.org. Retrieved 2013-06-14.
- "World Nuclear Power Reactors 2007-08 and Uranium Requirements". World Nuclear Association. 2008-06-09. Archived from the original on March 3, 2008. Retrieved 2008-06-21.
- "Japan approves two reactor restarts". Taipei Times. 2013-06-07. Retrieved 2013-06-14.
- "What is Nuclear Power Plant - How Nuclear Power Plants work | What is Nuclear Power Reactor - Types of Nuclear Power Reactors". EngineersGarage. Retrieved 2013-06-14.
- "Nuclear-Powered Ships | Nuclear Submarines". World-nuclear.org. Retrieved 2013-06-14.
- http://www.ewp.rpi.edu/hartford/~ernesto/F2010/EP2/Materials4Students/Misiaszek/NuclearMarinePropulsion.pdf Naval Nuclear Propulsion, Magdi Ragheb. As of 2001, about 235 naval reactors had been built
- "Beyond ITER". The ITER Project. Information Services, Princeton Plasma Physics Laboratory. Archived from the original on 7 November 2006. Retrieved 5 February 2011. - Projected fusion power timeline
- Union-Tribune Editorial Board (March 27, 2011). "The nuclear controversy". Union-Tribune.
- James J. MacKenzie. Review of The Nuclear Power Controversy by Arthur W. Murphy The Quarterly Review of Biology, Vol. 52, No. 4 (Dec., 1977), pp. 467-468.
- In February 2010 the nuclear power debate played out on the pages of the New York Times, see A Reasonable Bet on Nuclear Power and Revisiting Nuclear Power: A Debate and A Comeback for Nuclear Power?
- U.S. Energy Legislation May Be 'Renaissance' for Nuclear Power.
- "Nuclear Power". Nc Warn. Retrieved 2013-06-22.
- Sturgis, Sue. "Investigation: Revelations about Three Mile Island disaster raise doubts over nuclear plant safety". Southernstudies.org. Retrieved 2010-08-24.
- Strengthening the Safety of Radiation Sources p. 14.
- Johnston, Robert (September 23, 2007). "Deadliest radiation accidents and other events causing radiation casualties". Database of Radiological Incidents and Related Events.
- Markandya, A.; Wilkinson, P. (2007). "Electricity generation and health". Lancet 370 (9591): 979–990. doi:10.1016/S0140-6736(07)61253-7. PMID 17876910.
- "Dr. MacKay Sustainable Energy without the hot air". Data from studies by the Paul Scherrer Institute including non EU data. p. 168. Retrieved 15 September 2012.
- http://www.forbes.com/sites/jamesconca/2012/06/10/energys-deathprint-a-price-always-paid/ with Chernobyl's total predicted linear no-threshold cancer deaths included, nuclear power is safer when compared to many alternative energy sources' immediate, death rate.
- Brendan Nicholson (2006-06-05). "Nuclear power 'cheaper, safer' than coal and gas". The Age. Retrieved 2008-01-18.
- http://www.tandfonline.com/doi/abs/10.1080/10807030802387556 Human and Ecological Risk Assessment: An International Journal Volume 14, Issue 5, 2008 - A comparative analysis of accident risks in fossil, hydro, and nuclear energy chains. If you cannot access the paper via the above link, the following link is open to the public, credit to the authors. http://gabe.web.psi.ch/pdfs/_2012_LEA_Audit/TA01.pdf Page 962 to 965. Comparing Nuclear's latent cancer deaths, such as cancer with other energy sources immediate deaths per unit of energy generated(GWeyr). This study does not include Fossil fuel related cancer and other indirect deaths created by the use of fossil fuel consumption in its "severe accident", an accident with more than 5 fatalities, classification.
- Richard Schiffman (12 March 2013). "Two years on, America hasn't learned lessons of Fukushima nuclear disaster". The Guardian.
- Martin Fackler (June 1, 2011). "Report Finds Japan Underestimated Tsunami Danger". New York Times.
- "Collectively, life cycle assessment literature shows that nuclear power is similar to other renewable and much lower than fossil fuel in total life cycle GHG emissions.''". Nrel.gov. 2013-01-24. Retrieved 2013-06-22.
- Prevented Mortality and Greenhouse Gas Emissions from Historical and Projected Nuclear Power - global nuclear power has prevented an average of 1.84 million air pollution-related deaths and 64 gigatonnes of CO2-equivalent (GtCO2-eq) greenhouse gas (GHG) emissions that would have resulted from fossil fuel burning. Pubs.acs.org. doi:10.1021/es3051197?source=cen.
- "Worldwide First Reactor to Start Up in 2013, in China - World Nuclear Industry Status Report". Worldnuclearreport.org. Retrieved 2013-06-14.
- Ayesha Rascoe (Feb 9, 2012). "U.S. approves first new nuclear plant in a generation". Reuters.
- Mark Cooper (18 June 2013). "Nuclear aging: Not so graceful". Bulletin of the Atomic Scientists.
- Matthew Wald (June 14, 2013). "Nuclear Plants, Old and Uncompetitive, Are Closing Earlier Than Expected". New York Times.
- Sylvia Westall and Fredrik Dahl (June 24, 2011). "IAEA Head Sees Wide Support for Stricter Nuclear Plant Safety". Scientific American.
- "Gauging the pressure". The Economist. 28 April 2011.
- European Environment Agency (Jan 23, 2013). "Late lessons from early warnings: science, precaution, innovation: Full Report". p. 476.
- Kidd, Steve (January 21, 2011). "New reactors—more or less?". Nuclear Engineering International.
- Ed Crooks (12 September 2010). "Nuclear: New dawn now seems limited to the east". Financial Times. Retrieved 12 September 2010.
- Edward Kee (16 March 2012). "Future of Nuclear Energy". NERA Economic Consulting. Retrieved 2 October 2013.
- The Future of Nuclear Power. Massachusetts Institute of Technology. 2003. ISBN 0-615-12420-8. Retrieved 2006-11-10.
- Patel, Tara; Francois de Beaupuy (24 November 2010). "China Builds Nuclear Reactor for 40% Less Than Cost in France, Areva Says". Bloomberg. Retrieved 2011-03-08.
- Massachusetts Institute of Technology (2011). "The Future of the Nuclear Fuel Cycle". p. xv.
- Tomoko Yamazaki and Shunichi Ozasa (27 June 2011). "Fukushima Retiree Leads Anti-Nuclear Shareholders at Tepco Annual Meeting". Bloomberg.
- Mari Saito (7 May 2011). "Japan anti-nuclear protesters rally after PM call to close plant". Reuters.
- Ipsos (23 June 2011), Global Citizen Reaction to the Fukushima Nuclear Plant Disaster (theme: environment / climate) Ipsos Global @dvisor. Survey website: Ipsos MORI: Poll: Strong global opposition towards nuclear power.
- "Sunday Dialogue: Nuclear Energy, Pro and Con". New York Times. February 25, 2012.
- MacKenzie, James J. (December 1977). "The Nuclear Power Controversy by Arthur W. Murphy". The Quarterly Review of Biology 52 (4): 467–8. doi:10.1086/410301. JSTOR 2823429.
- Walker, J. Samuel (10 January 2006). Three Mile Island: A Nuclear Crisis in Historical Perspective. University of California Press. pp. 10–11. ISBN 9780520246836.
- In February 2010 the nuclear power debate played out on the pages of the New York Times, see A Reasonable Bet on Nuclear Power and Revisiting Nuclear Power: A Debate and A Comeback for Nuclear Power?
- In July 2010 the nuclear power debate again played out on the pages of the New York Times, see We’re Not Ready Nuclear Energy: The Safety Issues
- Kitschelt, Herbert P. (2009). "Political Opportunity Structures and Political Protest: Anti-Nuclear Movements in Four Democracies". British Journal of Political Science 16: 57. doi:10.1017/S000712340000380X.
- Jim Falk (1982). Global Fission: The Battle Over Nuclear Power, Oxford University Press, pages 323-340.
- U.S. Energy Legislation May Be `Renaissance' for Nuclear Power.
- Bernard Cohen. "The Nuclear Energy Option". Retrieved 2009-12-09.
- J. M. Pearce, “Limitations of Nuclear Power as a Sustainable Energy Source, Sustainability 4(6), pp.1173-1187 (2012).
- "Nuclear Energy is not a New Clear Resource". Theworldreporter.com. 2010-09-02.
- Greenpeace International and European Renewable Energy Council (January 2007). Energy Revolution: A Sustainable World Energy Outlook, p. 7.
- Giugni, Marco (2004). Social protest and policy change: ecology, antinuclear, and peace movements in comparative perspective. Rowman & Littlefield. pp. 44–. ISBN 9780742518278.
- Stephanie Cooke (2009). In Mortal Hands: A Cautionary History of the Nuclear Age, Black Inc., p. 280.
- Sovacool, Benjamin K. (2008). "The costs of failure: A preliminary assessment of major energy accidents, 1907–2007". Energy Policy 36 (5): 1802. doi:10.1016/j.enpol.2008.01.040.
- Jim Green . Nuclear Weapons and 'Fourth Generation' Reactors Chain Reaction, August 2009, pp. 18-21.
- Kleiner, Kurt (2008). "Nuclear energy: Assessing the emissions". Nature Reports Climate Change (810): 130. doi:10.1038/climate.2008.99.
- Mark Diesendorf (2007). Greenhouse Solutions with Sustainable Energy, University of New South Wales Press, p. 252.
- Mark Diesendorf. Is nuclear energy a possible solution to global warming?
- "The myth of renewable energy | Bulletin of the Atomic Scientists". Thebulletin.org. 2011-11-22. Retrieved 2013-10-03.
- REN21 (2010). Renewables 2010 Global Status Report[dead link] p. 15.
- REN21 (2011). "Renewables 2011: Global Status Report". pp. 17, 18.
- REN21 (2013). "Renewables global futures report 2013".
- International Energy Agency (2012). "Energy Technology Perspectives 2012".
- United Nations Environment Programme Global Trends in Sustainable Energy Investment 2007: Analysis of Trends and Issues in the Financing of Renewable Energy and Energy Efficiency in OECD and Developing Countries (PDF), p. 3.
- World Energy Assessment (2001). Renewable energy technologies, p. 221.
- Steve Leone (25 August 2011). "U.N. Secretary-General: Renewables Can End Energy Poverty". Renewable Energy World.
- GWEC, Global Wind Report Annual Market Update
- "World Wind Energy Report 2010" (PDF). Report. World Wind Energy Association. February 2011. Retrieved 8 August 2011.
- "Wind Power Increase in 2008 Exceeds 10-year Average Growth Rate". Worldwatch.org. Retrieved 2010-08-29.
- Global wind energy markets continue to boom – 2006 another record year (PDF).
- "Renewables". eirgrid.com. Retrieved 22 November 2010.
- REN21 (2011). "Renewables 2011: Global Status Report". p. 11.
- Solar power generation world record set in Germany
- Spain Renewable Energy and High Penetration
- Terra-Gen Press Release, 17 April 2012
- Started in August 2001, the Jaisalmer based facility crossed 1,000 Mw capacity to achieve this milestone
- Drilling Down: What Projects Made 2008 Such a Banner Year for Wind Power?
- AWEA: U.S. Wind Energy Projects – Texas
- CEZ Group: The Largest Wind Farm in Europe Goes Into Trial Operation
- AWEA: U.S. Wind Energy Projects – Indiana
- E.ON Delivers 335-MW of Wind in Texas
- Worldwatch Institute (January 2012). "Use and Capacity of Global Hydropower Increases".
- Renewables 2011 Global Status Report, page 25, Hydropower, REN21, published 2011, accessed 2011-11-7.
- Edwin Cartlidge (18 November 2011). "Saving for a rainy day". Science (Vol 334). pp. 922–924.
- "Solar Energy Perspectives: Executive Summary" (PDF). International Energy Agency. 2011. Archived from the original on 2011-12-03.
- Solar Fuels and Artificial Photosynthesis. Royal Society of Chemistry 2012 http://www.rsc.org/ScienceAndTechnology/Policy/Documents/solar-fuels.asp (accessed 11 March 2013)
- Pearce, Joshua (2002). open access "Photovoltaics – A Path to Sustainable Futures". Futures 34 (7): 663–674. doi:10.1016/S0016-3287(02)00008-3.
- European Photovoltaic Industry Association (2013). "Global Market Outlook for Photovoltaics 2013-2017".
- European Photovoltaic Industry Association (2012). "Market Report 2011".
- Global Solar PV installed Capacity crosses 100GW Mark. renewindians.com (11 February 2013).
- Swanson, R. M. (2009). "Photovoltaics Power Up". Science 324 (5929): 891–2. doi:10.1126/science.1169616. PMID 19443773.
- Renewable Energy Policy Network for the 21st century (REN21), Renewables 2010 Global Status Report, Paris, 2010, pp. 1–80.
- Investing in Solar Electricity. What’s the Payback?. energy.ltgovernors.com. Retrieved on 21 April 2012.
- "Biofuels Make a Comeback Despite Tough Economy". Worldwatch Institute. 2011-08-31. Retrieved 2011-08-31.
- "Technology Roadmap, Biofuels for Transport". 2011.
- How Geothermal energy works. Ucsusa.org. Retrieved on 2013-04-24.
- Lay, T., Hernlund, J., & Buffett, B. A. (2008). Core–mantle boundary heat flow. Nature Geoscience, 1(1), 25-32.
- Nemzer, J. "Geothermal heating and cooling".
- "Geothermal capacity | About BP | BP Global". Bp.com. Retrieved 2013-10-05.
- Fridleifsson, Ingvar B.; Bertani, Ruggero; Huenges, Ernst; Lund, John W.; Ragnarsson, Arni; Rybach, Ladislaus (2008-02-11), O. Hohmeyer and T. Trittin, ed., The possible role and contribution of geothermal energy to the mitigation of climate change (pdf), IPCC Scoping Meeting on Renewable Energy Sources, Luebeck, Germany, pp. 59–80, retrieved 2009-04-06
- Glassley, William E. (2010). Geothermal Energy: Renewable Energy and the Environment, CRC Press, ISBN 9781420075700.
- Green Power. eweb.org
- Cothran, Helen (2002), Energy Alternatives, Greenhaven Press, ISBN 0737709049
- Fridleifsson, Ingvar. "ScienceDirect – Renewable and Sustainable Energy Reviews : Geothermal energy for the benefit of the people". Retrieved 14 November 2011.
- Paul Gipe (4 April 2013). "100 Percent Renewable Vision Building". Renewable Energy World.
- IPCC (2011). "Special Report on Renewable Energy Sources and Climate Change Mitigation". Cambridge University Press, Cambridge, United Kingdom and New York, NY, USA. p. 17.
- S. Pacala and R. Socolow (2004). "Stabilization Wedges: Solving the Climate Problem for the Next 50 Years with Current Technologies". Science Vol. 305. pp. 968–972.
- Mark A. Delucchi and Mark Z. Jacobson (2011). "Providing all global energy with wind, water, and solar power, Part II: Reliability, system and transmission costs, and policies". Energy Policy 39. Elsevier Ltd. pp. 1170–1190.
- National Research Council (2010). "Electricity from Renewable Resources: Status, Prospects, and Impediments". National Academies of Science. p. 4.
- Amory Lovins (March–April 2012). "A Farewell to Fossil Fuels". Foreign Affairs.
- "Philips Tornado Asian Compact Fluorescent". Philips. Retrieved 2007-12-24.
- Richard L. Kauffman Obstacles to Renewable Energy and Energy Efﬁciency. in: From Silos to Systems: Issues in Clean Energy and Climate Change. A report on the work of the REIL Network, 2008-2010. Edited by Parker L et al. Yale School of Forestry & Environmental Studies 2010
- Diesendorf, Mark (2007). Greenhouse Solutions with Sustainable Energy, UNSW Press, p. 86.
- Sophie Hebden (2006-06-22). "Invest in clean technology says IEA report". Scidev.net. Retrieved 2010-07-16.
- "The Twin Pillars of Sustainable Energy: Synergies between Energy Efficiency and Renewable Energy Technology and Policy". Aceee.org. Archived from the original on 2008-05-05. Retrieved 2010-07-16.
- U.S. Energy Utilization in 2007
- Fuel Cell Materials Technology in Vehicular Propulsion: Report. National Academies, 1983.
- "Oak Ridge National Laboratory — Biomass, Solving the science is only part of the challenge". Retrieved 2008-01-06.
- GIC measurements eurisgic.org
- Solar Terrestrial Dispatch - Leaders in Space Weather Forecasting Services
- "Oil Price Leap in the Early Nineties," Noroil, December 1989, pages 35–38.
- Opec Oil Outlook to 2025 Table 4, Page 12
- Sustainable Development and Innovation in the Energy Sector. Ulrich Steger, Wouter Achterberg, Kornelis Blok, Henning Bode, Walter Frenz, Corinna Gather, Gerd Hanekamp, Dieter Imboden, Matthias Jahnke, Michael Kost, Rudi Kurz, Hans G. Nutzinger, Thomas Ziesemer. Springer, Dec 5, 2005.
- Energy independence and security: A reality check - Deloitte
- Brittle Power: Energy Plan for National Security. Amory B. Lovins and L. Hunter Lovins (1982).
- "The Fragility of Domestic Energy." Amory B. Lovins and L. Hunter Lovins. Atlantic Monthly. November 1983.
- "Our Electric Future." Andrew Grove. The American. July/August 2008.
- Andrew Grove and Robert Burgelman (December 2008). "An Electric Plan for Energy Resilience". McKinsey Quarterly. Retrieved 2010-07-20.
- Resilience in Energy: Building Infrastructure Today for Tomorrow’s Automotive Fuel. Reform Institute. March 2009.
- Mandil, C. (2008) "Our energy for the future". S.A.P.I.EN.S. 1 (1)
- Energy conservation through effective energy utilization. By United States. National Bureau of Standards, National Science Foundation (U.S.), Engineering Foundation (U.S.)
- Eating Fossil Fuels
- Peak Oil: the threat to our food security retrieved 28 May 2009
- Faunce TA, Lubitz W, Rutherford AW, MacFarlane D, Moore, GF, Yang P, Nocera DG, Moore TA, Gregory DH, Fukuzumi S, Yoon KB, Armstrong FA, Wasielewski MR, Styring S. ‘Energy and Environment Case for a Global Project on Artificial Photosynthesis.’ Energy and Environmental Science 2013, 6 (3), 695 - 698 DOI:10.1039/C3EE00063J http://pubs.rsc.org/en/content/articlelanding/2013/ee/c3ee00063j (accessed 13 March 2013)
- Joan Lisa Bromberg (October 2000). NASA and the Space Industry. JHU Press. p. 1. ISBN 978-0-8018-6532-9. Retrieved 10 June 2011.
- Kai-Uwe Schrogl (2 August 2010). Yearbook on Space Policy 2008/2009: Setting New Trends. Springer. p. 49. ISBN 978-3-7091-0317-3. Retrieved 10 June 2011.
- Propulsion Techniques: Action and Reaction edited by Peter J. Turchi. p341
- Climate Change: The Science, Impacts and Solutions. Edited by A. Pittock
- Future Spacecraft Propulsion Systems. By Paul A. Czysz, Claudio Bruno
- Physics of the Future. By Michio Kaku.
- Romano, Anthony F. (2005). "SPACE A Report on the Industry". Defense Technical Information Center. Retrieved 15 May 2011.
- Serra, J. "Alternative Fuel Resource Development", Clean and Green Fuels Fund, (2006).
- Bilgen, S. and K. Kaygusuz, Renewable Energy for a Clean and Sustainable Future, Energy Sources 26, 1119 (2004).
- Energy analysis of Power Systems, UIC Nuclear Issues Briefing Paper 57 (2004).
- Silvestre, B. S., Dalcol, P. R. T. Geographical proximity and innovation: Evidences from the Campos Basin oil & gas industrial agglomeration — Brazil. Technovation (2009), doi:10.1016/j.technovation.2009.01.003
- Energy Sources, Part A: Recovery, Utilization and Environmental Effects
- Energy Sources, Part B: Economics, Planning and Policy
- International Journal of Green Energy
- Bureau of Land Management 2012 Renewable Energy Priority Projects
- Energypedia - a wiki about renewable energies in the context of development cooperation
- Hidden Health and Environmental Costs Of Energy Production and Consumption In U.S.
- RECaBS REcalculator Interactive Renewable Energy Calculator — compare renewable energy to conventional energy sources
- IEA-ECES - International Energy Agency - Energy Conservation through Energy Conservation programme.
- IEA-SHC - International Energy Agency - Solar Heating and Cooling programme.
- SDH - Solar District Heating Platform. (European Union)