The parts that make up a green home are not universally agreed upon. There do not exist national standards on what constitutes a green remodel, beyond non-profit certification. In general, a green home is a type of house that is built or remodeled in order to conserve "energy or water; improve indoor air quality; use sustainable, recycled or used materials; and produce less waste in the process." This may include buying more energy-efficient appliances or utilizing specific building materials that are more efficient in keeping both cool and heated air inside the structure.
The original major modern turn to the green building movement began in the 1970s, after the price of oil began to increase sharply. In response, researchers began to look into more energy efficient processes, following in the wake of the earlier environmental movement. Many different organizations sprung up in the 1990s in order to promote green buildings and some were also dedicated to improving the knowledge of consumers so that they could have more green homes. The International Code Council and the National Association of Home Builders began the paperwork in 2006 in order to create a "voluntary green home building standard".
The Energy Policy Act was legalized in 2005, which allowed tax reductions for homeowners that could show their utilization of energy efficient changes to their homes, such as solar panels and other solar-powered devices.
There are various types of certifications globally that declare a home as a Green home. The U.S. Green Building Council is an example of a type of organization that gives out green home certifications. Its certification is titled Leadership in Energy and Environmental Design. The factors that it considers in its certification system include "the site location, use of energy and water, incorporation of healthier building and insulation materials, recycling, use of renewable energy, and protection of natural resources".
The National Association of Home Builders also independently created its Model Green Home Building Guidelines during the same period as a type of certification, along with a number of other programs for various utilities.
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