For those of you who have heard about the Earth Hour, well this Saturday 28th March 2009 millions of people are expected to switch of all their lights at 8:30pm (9:30 GMT) for an hour all over the world. It started off two years ago when about 2 million people switched off their lights in Sydney, Australia and after two years it has spread all over the globe. Popular landmarks are expected to remain dark during this hour and many million homes are expected also.
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