The Sydney skyline is illuminated shortly before the start of the 6th annual Earth Hour 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 / Torsten BLACKWOOD
The Sydney skyline is darkened at the start of the 6th annual Earth Hour 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 / Torsten BLACKWOOD
A combination picture shows power lines crossing in front of the Sydney city skyline on March 29, 2012 (top) before Earth Hour, and during Earth Hour March 31, 2012. Earth Hour, when everyone around the world is asked to turn off lights for an hour from 8.30 p.m. local time, is meant as a show of support for tougher action to confront climate change. REUTERS/Tim Wimborne (AUSTRALIA - Tags: ENVIRONMENT SOCIETY CITYSPACE)