Earth Hour 2015

A week ago, on Saturday, March 28, iconic landmarks and skylines were plunged into darkness as people and businesses around the world participated in Earth Hour 2015, turning off their lights at 8:30 p.m. local time. Earth Hour was organized by the World Wildlife Fund in 2007 as a way to bring attention to energy consumption, sustainability, and climate-change issues. The images below (starting with photo number two) are interactive—click on each image to "turn off the lights."

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