Earth Hour 2012

Associated Press
A child lights a candle during a ceremony to mark Earth Hour at Palace Square  in St.Petersburg, Russia, Saturday, March 31, 2012. Earth Hour takes place worldwide at 8.30 p.m. local times and is a global call to turn off lights for 60 minutes in a bid to highlight the global climate change. (AP Photo/Dmitry Lovetsky)

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Landmarks around the globe dimmed their lights on Saturday March 31, 2012, for the annual Earth Hour campaign. Earth Hour is a world wide effort to raise awareness about climate change.

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