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Earth Hour 2010 was a night to remember

WWF's Earth Hour on March 27, 2010 was bigger and better then ever.

With millions of people taking part across the globe it was a real and powerful message to those in power that tackling climate change is one of the most important issues we all face.

Take a look at our film and see what Earth Hour is all about!

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Look at some of the amazing Earth Hour photos



Before and after!

Check out these amazing interactive before and after pictures of some key UK landmarks!


Earth Hour kicked off to a great start in the Pacific

Tokyo Tower with lights on Earth Hour 2010 Tokyo Tower with lights off Earth Hour 2010




















Earth Hour crosses Asia – from Kazakhstan to the Maldives

India Gate with lights on Earth Hour 2010 India Gate with lights off Earth Hour 2010





See more pictures of how the night unfolded...