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As the saying goes, the Stone Age did not end because we ran out of stones; we transitioned to better solutions. The same opportunity lies before us with energy efficiency and clean energy.

Steven Chu
Lying, Science, Opportunity
Letter from Secretary Steven Chu to Energy Department Employees, energy.gov. February 1, 2013.
As the saying goes, the Stone Age did not end because we ran out of stones; we transitioned to better solutions. The same opportunity lies before us with energy efficiency and clean energy.