EARTH HOUR PICTURES: Before & After the Lights Went Out

EARTH HOUR PICTURES: Before & After the Lights Went Out
EARTH HOUR PICTURES: Before & After the Lights Went Out
EARTH HOUR PICTURES: Before & After the Lights Went Out
EARTH HOUR PICTURES: Before & After the Lights Went Out
EARTH HOUR PICTURES: Before & After the Lights Went Out
EARTH HOUR PICTURES: Before & After the Lights Went Out
EARTH HOUR PICTURES: Before & After the Lights Went Out
EARTH HOUR PICTURES: Before & After the Lights Went Out
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EARTH HOUR PICTURES: Before & After the Lights Went Out
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Sydney Before Earth Hour

With an estimated 4.34 million residents, Sydney, shown on Earth Day 2008, is Australia's most populous city. In 2007, 2.2 million of Sydney's denizens went dark for an hour to show support for reductions in activities that worsen global warming. The event's unexpected popularity in 2007 prompted organizer WWF to take Earth Hour global in 2008.

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—Photograph by James Alcock, courtesy WWF
 

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