It is one of the world's most famous office buildings, and now it is also New York City's largest commercial purchaser of renewable energy. Under a newly-signed contract with Green Mountain Energy, 100 percent 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.

All of this adds to $20 million energy efficiency improvements undertaken at the New York City landmark, intended to reduce building's energy usage by 40 percent and $4,4 million annually.

Purchasing this amount of renewable energy will avoid about 50,000 tons of CO2 emissions annually. Green Mountain estimates the CO2 reduction is the equivalent of nearly every house in New York state turning off their lights for a week or planting nearly 150,000 trees, which is more then six times the number of them in Central Park in New York.

Tekst: Borko Milosevic



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