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Before (above) and after switching off the lighting of the Lausanne's Cathedral behind an empty street during the world's largest environmental and climate protection campaign "Earth Hour" during the state of emergency of the coronavirus disease (COVID-19) outbreak, in Lausanne, Switzerland, Saturday, March 28, 2020. Earth Hour 2020, a WWF environmental campaign event annually held on the last Saturday of March to raise awareness of climate change by encouraging people to turn off their lights and electric appliances for an hour. (KEYSTONE/Laurent Gillieron)