Last night, a number of buildings, including the Empire State Building, plus numerous billboards in Times Square, went dark between 8:30 p.m. and 9:30 p.m. for Earth Hour, "to make a statement on the need for effective action on climate change." While some structures did go dim their lights, much of the city was still glowing. Well, it's a step—last year, New York City didn't even participate!