The 10 Most Energy-Efficient U.S. States

By Amelia Hennighausen - 2013-11-07T19:23:45Z

Photograph by Huber/SIME/eStock Photo

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2. California

California’s leadership in all matters energy is almost legendary.

New building standards go into effect at the beginning of 2014 that will improve residential energy efficiency 25 percent and nonresidential efficiency 30 percent.

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