Earth Hour 2010 took place a few days ago. The Big Picture has this awesome series of before-and-after photographs which fade between "on" and "off" when clicked.
Beginning in Sydney, Australia three years ago, Earth Hour has grown into a global observance. States, large organizations and individual people observed Earth Hour 2010 on Saturday March 27th, as homes, office towers and landmarks turned off their lights for an hour starting at 8.30pm local time to raise awareness about climate change and the threat from rising greenhouse gas emissions.
Earth Hour 2010 - The Big Picture
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