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Global landmarks go dark for Earth Hour

More than 7,000 cities took part in the World Wildlife Fund's campaign to raise awareness about climate change.

http://www.wzzm13.com/video/2250961045001/1/Global-landmarks-go-dark-for-Earth-Hour http://bc_gvpc.edgesuite.net/img/963482463001/201303/2195/963482463001_2250748859001_thumbnail-for-video-2250923804001.jpg?pubId=963482463001 Global landmarks go dark for Earth Hour More than 7,000 cities took part in the World Wildlife Fund's campaign to raise awareness about climate change. vpcbestEarth HourwwfInternational newsvpcGreen/Environmentclimate changeVPC;Reuters 00:45

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