Started in 2007 by WWF and partners as a symbolic lights-out event in Sydney to raise awareness of climate change, Earth Hour is now one of the world's ... ... <看更多>
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Started in 2007 by WWF and partners as a symbolic lights-out event in Sydney to raise awareness of climate change, Earth Hour is now one of the world's ... ... <看更多>
WWF started Earth Hour in 2007 to unite the world and make a stand against climate change. Today, Earth Hour is the world's largest environmental movement ... ... <看更多>