A Tour of the U.S.’s Clean Energy Future [Slide Show]

NATIONAL HARBOR, Md.–At least three forms of security depend on inventing a future of cheap, clean energy: national, economic and environmental. President Barack Obama launched the Advanced Research Projects Agency for Energy ( ARPA-E ) in 2009 to fund innovative research in the hopes of delivering such technologies

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A Tour of the U.S.’s Clean Energy Future [Slide Show]