Energy production based on sources of energy that do not run out, for example wind, water and solar power. The production of renewable energy does not in itself discharge greenhouse gases, but the production and the installation of plant, or other circumstances – for example the formation of methane in water reservoirs – can place a strain on the climate. This strain is however far smaller than when fossil fuels are used.

United Nations official site Cop 15 Copenhagen. http://es.cop15.dk/