Empire State Building Now Fully Wind Powered

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It well may be the world's most famous office building, at least it's owners think so, but the Empire State Building is now also New York City's largest commercial purchaser of renewable energy. Under a newly-signed contract with Green Mountain Energy, 100% of the building's electricity, all 55 million kilowatt-hours of it, will come from wind power, via renewable energy certificates from Green Mountain's parent company NRG Energy.Nationally, based on EPA rankings on green power purchases, the Empire State Building is expected to come in at number 18 for 100% green power purchasers.

All of this adds to the impressive $20 million energy efficiency improvements undertaken at the New York City landmark, intended to reduce energy use by 40%.

Purchasing this amount of renewable energy will avoid about 50,000 tons of CO2 emissions annually.