World landmarks dimmed for Earth Hour
Earth Hour
Credit: AFP/Getty Images
People launch a Chinese paper wish lantern during the sixth annual Earth Hour in Moscow on March 31, 2012. Millions of people were expected to switch off their lights for Earth Hour on March 31 in a global effort to raise awareness about climate change that was even to be monitored from space. AFP PHOTO / KIRILL KUDRYAVTSEV (Photo credit should read KIRILL KUDRYAVTSEV/AFP/Getty Images)
