[flickr video=4469315954 w=500 h=281]
March 27, 2010 at 8:30pm local time was Earth Hour. Across the world, as the Earth Hour approached, people, cities, and famous landmarks turned off the lights and lit up the candles. See more Earth Hour photos from all over the world in the Earth Hour 2010 group.
Photos by BAPS UK, Caryn Hughes, Flipped Out, Bearmeister, shhflights, iandoubleyou, redgedeparlemonde and jliebs5.