Peak copper is a hypothetical point in time at which the maximum global copper production rate is reached. Since copper is a finite resource, at some point in the future new production from within the earth will diminish, and at some earlier time production will reach a maximum. When this will occur is a matter of dispute. Unlike fossil fuels, however, copper is scrapped and reused and it has been estimated that at least 80% of all copper ever mined is still available (having been repeatedly recycled). Copper is among the most important industrial metals. Copper is used in electrical power cables, data cables, electrical equipment, automobile radiators, cooling and refrigeration tubing, heat exchangers, artillery shell casings, small arms ammunition, water pipes, and jewellery. Copper has been in use at least 10,000 years, but more than 95% of all copper ever mined and smelted has been extracted since 1900. As India and China race to catch up with the West, the copper supply chain is becoming more strained, leading to increased prices and an increase in copper theft.
Concern about the copper supply is not new. In 1924, noted geologist and copper-mining expert Ira Joralemon warned:
- "... the age of electricity and of copper will be short. At the intense rate of production that must come, the copper supply of the world will last hardly a score of years. ... Our civilization based on electrical power will dwindle and die."
Copper demand 
Total world production is about 17 million tonnes per year. Copper demand is increasing by more than 575,000 tons annually and accelerating. Based on 2006 figures for per capita consumption, Tom Graedel and colleagues at Yale University calculate that by 2100 global demand for copper will outstrip the amount extractable from the ground. China accounts for more than 22% of world copper demand.
For some purposes, other metals can substitute. During a copper shortage in the 1970s, aluminium wire was substituted in many applications, but improper design caused a fire danger. The safety issues have since been solved by use of larger sizes of aluminium wire (#8AWG and up), and properly designed aluminium wiring is still being installed in place of copper.
Copper supply 
Globally, economic copper resources are being depleted with the equivalent production of three world-class copper mines being consumed annually. Environmental analyst Lester Brown has suggested copper might run out within 25 years based on what he considered a reasonable extrapolation of 2% growth per year.
New copper discoveries 
The chief producers of copper are Chile, United States, and Peru. 21 of the 28 largest copper mines in the world are not amenable to expansion. Many large copper mines will be exhausted between 2010 and 2015.
Copper is a fairly common element, with an estimated concentration of 50-70 ppm (0.005-0.007%) in Earth's crust (1 kg of copper per 15-20 tons of crustal rock). If all this copper were extractable, that would provide humans with a nearly inexhaustible supply of the element (millions of years worth), from that concentration adding up to around 2 quadrillion tons over the mass of the crust. However, most of it can not be extracted profitably at the current level of technology and the current market value. At the present time, copper deposits are considered potentially profitable if they are located sufficiently close to the surface and they contain at least 0.3-0.5% of copper.
The U.S. Geological Survey reported a current total reserve base of copper in potentially recoverable ores of 1.6 billion tonnes as of 2005, of which 950 million tonnes was considered economically recoverable.
Known conventional resources 
Each year in the USA, more copper is recovered and put back into service from recycled material than is derived from newly mined ore. Copper’s recycle value is so great that premium-grade scrap normally has at least 95% of the value of primary metal from newly mined ore.
Undiscovered conventional resources 
Based on current discovery rates and existing geologic surveys, researchers have estimated that 1.6 billion metric tons of copper exist that could potentially be brought into use. This figure relies on the broadest possible definition of available copper as well as a lack of energy constraints and environmental concerns.
Unconventional resources 
Deep-sea nodules are estimated to contain 700 million tonnes of copper.
Chile is the world's largest copper producer, and in 2007 accounted for 37% of the world's primary copper production (see table above). One researcher has stated that Chile copper production may begin to decline irreversibly in 2008. However, this is contradicted by the Chilean Copper Commission, which has projected that, based on planned expansion projects, Chilean copper production will continue to increase through at least 2012.
The price of copper struck a first peak level on March 6, 2008 on the London Metal Exchange (LME), surging 5.8 percent over the previous trading day to US$4.02 per pound. The previous record was set on May 12, 2006 at $3.98/lb. The international copper price increased rapidly in early 2008, rising 23 percent in February 2008, then declined 40% before December 2008, and reached $1.30 by year's end. In February 2011 the price peaked at over US$10,100/tonne ($4.58/lb).
Julian Simon was a senior fellow at the Cato Institute and a professor of business and economics. In his book The Ultimate Resource 2 (first printed in 1981 and reprinted in 1998), he extensively criticizes the notion of "peak resources", and uses copper as one example. He argues that, even though "peak copper" has been a persistent scare since the early 20th century, "known reserves" grew at a rate that outpaced demand, and the price of copper was not rising but falling in the long run. For example, even though world production of copper in 1950 was only 1/8th of what it was today, known reserves were also much lower at the time – around 100 million metric tons – making it appear that the world would run out of copper in 40 to 50 years at most.
Simon's own explanation for this development is that the very notion of known reserves is deeply flawed, as it does not take into account changes in mining profitability. As richer mines are exhausted, developers turn their attention to poorer sources of the element and eventually develop cheap methods of extracting it, raising "known reserves". Thus, for example, copper was so abundant 5000 years ago, occurring in pure form as well as in highly concentrated copper ores, that prehistoric peoples were able to collect and process it with very basic technology. As of the early 21st century, copper is commonly mined from ores that contain 0.3% to 0.6% of copper by weight. Yet, despite the fact that the material is far less "widespread", the cost of, for example, a copper pot is vastly lower today in real terms than it was 5000 years ago.
Simon essentially states that not all viable copper has been discovered and that not all technological advancements in mining and refining have occurred, so statements that the point of peak copper has been or will be reached must be false. Simon supports his argument by showing that copper supplies have increased and prices have fallen. Simon's thesis of peak resources is not based on current scientific analysis or geological measurements, but the analysis of historical trends and the assumption that they can and will continue.
See also 
- Andrew Leonard (2006-03-02). "Peak copper?". Salon - How the World Works. Retrieved 2008-03-23.
- "Copper and electricity to vanish in twenty years?" Engineering and Mining Journal-Press 26 July 1924, v.118 n.4 p.122.
- Copper Statistics and Information, Mineral Commodity Summaries, 2013, http://minerals.usgs.gov/minerals/pubs/commodity/copper/
- David Cohen (2007-05-23). "Earth's natural wealth: an audit". New Scientist (2605): 34–41. Retrieved 2008-04-09.
- Dan Glaister, Tania Branigan and Owen Bowcott (2008-03-20). "Deaths and disruption as price rise sees copper thefts soar". The Guardian. Retrieved 2008-04-09.
- Brown, Lester (2006). Plan B 2.0: Rescuing a Planet Under Stress and a Civilization in Trouble. New York: W.W. Norton. p. 109. ISBN 0-393-32831-7.
- "Peak Copper Means Peak Silver". Charleston Voice. 2005-12-29. Retrieved 2008-04-09.
- Samuel K. Moore (2008-03). "Supply Risk, Scarcity, and Cellphones". IEEE Spectrum. IEEE. Retrieved 2008-03-23.
- "pg. 54 - Copper" (PDF). USGS. 2004. Retrieved 2008-04-09.
- "pg. 56 - Copper" (PDF). USGS. 2006. Retrieved 2008-04-09.
- "pg. 54 - Copper" (PDF). USGS. 2008. Retrieved 2008-04-09.
- "pg. 49 - Copper" (PDF). USGS. 2010. Retrieved 2012-07-15.
- "pg. 49 - Copper" (PDF). USGS. 2012. Retrieved 2012-07-15.
- Emsley, John (11 August 2003). Nature's building blocks: an A-Z guide to the elements. Oxford University Press. pp. 121–125. ISBN 978-0-19-850340-8. Retrieved 2 May 2011.
- American Geophysical Union, Fall Meeting 2007, abstract #V33A-1161. Mass and Composition of the Continental Crust
- David Biello (2006-01-17). "Measure of Metal Supply Finds Future Shortage". Scientific American. Retrieved 2008-03-23.
- "Copper in the USA: Bright Future – Glorious Past". Copper Development Association. Retrieved 2008-04-09.
- Chilean Copper Commission (Sept. 2006): Current and future situation of the copper industry in Chile (Adobe *.PDF file)
- "Zaire: IRIN Briefing Part II". University Of Pennsylvania. 1997-02-27. Retrieved 2008-04-09.
- "International copper price hits record high". China view. 2008-03-08. Retrieved 2008-04-09.
- Base Metals decline Times of India
- $1.30 price
- Chapt 12, The Ultimate Resource II, by Julian Simon
- The Ultimate Resource 2, by Julian Simon
- "US Minerals Databrowser". Mazama Science. Retrieved 2010-03-25.
- R. B. Gordon*, M. Bertram and T. E. Graedel (2006-01-31). "Metal Stocks and Sustainability". Proceedings of the National Academy of Sciences (U.S. National Academy of Sciences) 103 (5): 1209–1214. Bibcode:2006PNAS..103.1209G. doi:10.1073/pnas.0509498103. PMC 1360560. PMID 16432205. Retrieved 2008-03-23.