Photos: Cities go dark for 'Earth Hour'

Photos: Cities go dark for 'Earth Hour'

SYDNEY, AUSTRALIA - MARCH 23: The Opera House is seen after the lights were switched to 'GreenPower' and glowed dark green to recognize Earth Hour on March 23, 2013 in Sydney, Australia. Businesses and households around the world will turn their lights off for one hour at 20:30 local time today, to celebrate Earth Hour, raise awareness about climate change and to show support for the use of renewable energy. Earth hour began in Sydney in 2007 and is now celebrated in over 150 countries around the world. (Photo by Lisa Maree Williams/Getty Images)

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KMOV.com

Posted on March 23, 2013 at 4:50 PM

(AP) -- It's something of a voluntary rolling blackout: Communities around the globe are going dark for an hour on Saturday evening as part of an initiative called "Earth Hour," to raise awareness of climate change.

In more than 7,000 cities and towns across the planet, millions of residents are turning off their lights for an hour from 8:30 to 9:30 p.m. local time to show their environmental concern.

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