New Orleans ranked No. 47 of 51 major U.S. cities in terms of energy efficiency, according to the second edition of the City Energy Efficiency Scorecard.

The scorecard, released by the American Council for an Energy-Efficient Economy, ranks cities in five key areas: government operations, community initiatives, buildings, utilities and transportation.

Boston was the most energy-efficient city, followed by New York City, Washington, D.C., San Francisco, Seattle, Chicago, Minneapolis, Portland, Austin and Denver.

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