Earth Hour is created by WWF (World Wide Fund for Nature/World Wildlife Fund) in 2007 and has now become a global annual event. Earth Hour began in Sydney in 2007, when 2.2 million homes and businesses from 35 countries switched off their lights for one hour. In 2008, 50 million people switching off their lights on March 28. Now, Earth Hour 2009 will happen on the same date, March 28 and 80 countries and 1,500 cities are expected to participate.

You too can help to spread the word of the event. Just go to Earth Hour Download page. You can download the banners and widgets to show your support for Earth. Or you can even print your own Earth Hour T-shirts!

Watch the Official Earth Hour 2009 video: -

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