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Earth Hour: Before and after the lights switched off

World landmarks dimmed for 60 minutes in climate change awareness effort

Last Updated: April 1, 2012

Lights dimmed on iconic buildings around the world on March 31, 2012, during the annual Earth Hour. The event, held since 2007, encourages 60 minutes of darkness in a bid to bring attention to climate change. Drag the slider below to see what world landmarks looked like before (left) and after the lights went out at 8:30 p.m. local time. Use the arrows at the bottom of the gallery to navigate to the next photo.


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