World landmarks dimmed for Earth Hour
Earth Hour
Credit: AFP/Getty Images
A girl lays a candle 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 today 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)
