Since 2007, Earth Hour has gained worldwide support for positive action against global warming. It all began with 2.2 million people in one city using their light switches to have their say. By March 2009, hundreds of millions of people in over 4,000 cities in 88 countries officially switched off to vote for Earth.
This monumental swell of support for the environment has been four years in the making. And it’s all building towards one decisive moment in history - the Copenhagen climate summit, where world leaders will meet to discuss new ways of dealing with climate change.
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