Energy
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Energy overview
We are on the verge of a profound shift in the way we produce and use energy. More »
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Energy conservation and efficiency
Using less energy not only reduces greenhouse gas emissions, but also saves money and creates jobs and other economic benefits. More »
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Renewable energy policy
Countries such as Germany and Spain are world leaders in renewable energy and show what can be achieved quickly if the right policies are in place. More »
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Wind energy
Wind power is one of the fastest-growing sources of energy in the world, and has become a multi-billion-dollar industry. More »
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Solar energy
The sun is a free source of clean, reliable power that can heat water and buildings, and generate electricity. More »
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Hydroelectricity
With proper siting, hydroelectricity can play an important role in a future powered by renewable energy. More »
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Geothermal heat pumps
Geothermal heat pumps are one of the cheapest and most reliable ways to heat and cool most buildings today. More »
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Biomass
Biomass has the potential to generate significant electricity and heat, and provide a new source of income for farmers. More »
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Natural gas
Although natural gas produces fewer greenhouse gases than coal or oil, it is not a solution to climate change. More »
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Oil
Like other fossil fuels, oil's production, transport and use have significant environmental impacts. More »
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Coal
Burning coal to produce electricity affects air quality, human health, wildlife, and climate change. More »
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Nuclear energy
The energy source once billed as "too cheap to meter" has proven to be one of the most expensive — and environmentally risky — energy sources in history. More »
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Renewable-energy certificates (RECs)
One of the largest sources of greenhouse gas emissions is electricity generation. By choosing to buy green power from your local utility, you can lower your greenhouse gas emissions dramatically. More »
