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What is Green Energy?
From Wikipedia, the free encyclopedia

Green energy is a term describing what is considered to be environmentally friendly, typically non-polluting, sources of power and energy, some sources may use it interchangeably with renewable energy (see #Definition below). Additionally, some governments have drafted very specific definitions of green energy or an equivalent term which may be eligible for special subsidies or support in order to promote the technology.

Green energy is commonly thought of in the context of electricity, heating, and cogeneration, and is becoming increasingly available. Consumers, businesses, and organizations may specifically purchase green energy in order to support further development, help reduce the environmental impacts associated with conventional electricity generation, and increase their nation’s energy independence.

Energy sources

Green energy includes natural energetic processes that can be harnessed with little pollution. Anaerobic digestion, geothermal power, wind power, small-scale hydropower, solar power, biomass power, tidal power and wave power fall under such a category. Some versions may also include power derived from the incineration of waste.

Some organizations have specifically classified nuclear power as green energy such as cleantech.com. However, even the Nuclear Energy Institute has avoided the issue of directly classifying nuclear as green energy - a public awareness campaign launched for nuclear power uses the catch phrase clean air energy.

Likewise, medium or large-scale hydroelectric power or sources of air pollution such as burning biomatter or petroleum, consume water and are often excluded from the label 'green energy'.

Renewable energy certificates (Green certificates, or green tags) are currently the most convenient way for consumers and businesses to support "green power". Over 35 million homes in Europe, and 1 million in the United States, are purchasing such certificates.

No power source is entirely impact-free. All energy sources require energy and gives rise to some degree of pollution from manufacture of the technology.