Researcher Nick Sweeney holds a sample of chlorella algae strain for use as a renewable fuel at the National Renewable Energy Laboratory April 26, 2013 in Golden, CO.
Researcher Nick Sweeney holds a sample of chlorella algae strain for use as a renewable fuel at the National Renewable Energy Laboratory April 26, 2013 in Golden, CO.
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Location: Golden, Colorado
Photo credit: © DOE Photo / Alamy / Afripics
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