World landmarks dimmed for Earth Hour
Earth Hour
Credit: AFP/Getty Images
A picture taken on March 31, 2012 shows the Adam Clark square of Budapest and the oldest Hungarian bridge 'The Chain Bridge' after the city switched off its lights to mark the annual Earth Hour event. 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 / ATTILA KISBENEDEK (Photo credit should read ATTILA KISBENEDEK/AFP/Getty Images)
