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==Environment==
{{Main|Energy and the environment}}
Consumption of energy resources, (e.g. turning on a light) requires resources and has an effect on the [[environment (biophysical)|environment]]. Many electric power plants burn coal, oil or natural gas in order to
Burning fossil fuels for electricity generation also releases trace metals such as beryllium, cadmium, chromium, copper, manganese, mercury, nickel, and silver into the environment, which also act as pollutants. Certain [[renewable energy]] technologies do not pollute the environment in the same ways, and therefore can help contribute to a cleaner energy future for the world.<ref>[http://www.undp.org/energyandenvironment/ UNDP | Environment & Energy<!-- Bot generated title -->]</ref> Renewable energy technologies available for electricity production include [[biofuels]], [[solar power]], [[tidal power]], [[wind turbines]], [[hydroelectric power]] etc. However, serious [[Environmental concerns with electricity generation|environmental concerns]] have been articulated by several [[environmentalism|environmental activists]] regarding some of these modes of electricity generation. According to them, some pollution is invariably produced during the manufacture and retirement of the materials associated with the machinery used in these technologies. There is, however, general agreement that the most effective way to save the environment from expanding energy production is [[energy conservation]].
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