The two-year contract for 55 million kilowatt hours of renewable energy annually will prevent nearly 100 million pounds of carbon dioxide emissions each year, according to Green Mountain. The company 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 -- more than 6 times the number of in Central Park.
As part of its green retrofit, the Empire State Building has hired Serious Materials to remove, retrofit and replace each of its 6,514 double-hung, dual-pane windows. It's also adding insulation and other upgrades.
Too bad Chicago's Sears Tower beat you to it