Science & Environment

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Obama to federal agencies: triple use of clean energy by 2020

President Obama issued an executive order on Dec. 5, calling for an increase in solar, wind, and other renewable energy for federal agencies, to 20 percent by 2020 - three times more than the agencies currently use.

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Obama climate change speech important, but just a step

Obama argued for the necessity of tackling climate change. Al Gore said it was the "best presidential address on climate" ever.

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Emission Impossible: Obama plans to cut carbon output

As part of a planned comprehensive climate change strategy, President Obama will announce an effort in July to reduce carbon dioxide emissions.

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Obama signals strong action on climate change

Many environmentalists are encouraged by the fact that Obama is now starting to discuss climate change more.