The 13th annual Earth Hour was observed Saturday as nearly 200 major landmarks turned off their lights at 8:30 p.m. local time. The event, organized by the World Wildlife Fund, has grown steadily since the first event in 2007 and is now observed by more than 180 countries and territories.
Earth Hour 2019
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The UNESCO World Heritage Cologne Cathedral and the Hohenzollern railway bridge along the river Rhine are seen before Earth Hour in Cologne, March 30, 2019.
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The UNESCO World Heritage Cologne Cathedral and the Hohenzollern railway bridge along the river Rhine are seen during Earth Hour in Cologne, Germany, March 30, 2019.
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The Indian Defense Ministry, Presidential Palace and Home Ministry buildings are pictured before the lights were turned off for Earth Hour in New Delhi, March 30, 2019.
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The Indian Defense Ministry, Presidential Palace and Home Ministry buildings are pictured after the lights were turned off for Earth Hour in New Delhi, March 30, 2019.