An often-cited nine-year-old report from the United States Environmental Protection Agency (EPA) estimated that data centers accounted for approximately 1.5 percent of the country’s total electricity consumption. The EPA’s “Report to Congress on Server and Data Center Efficiency,” published in August 2007, was written in response to the U.S. Congress’s Public Law 109-431, which requested such a report. The EPA said the 133-page document “assesses current trends in energy use and energy costs of data centers and servers in the U.S. and outlines existing and emerging opportunities for improved energy efficiency.”

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