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Beijing Olympic Bird's Nest Goes Dark For Earth Hour 2021 © REUTERS / Thomas Peter https://cdn2.img.sputniknews.com/i/logo.png https://sputniknews.com/asia/202103271082464714-beijing-olympic-birds-nest-goes-dark-for-earth-hour-2021/ Earth Hour is an annual international environmental campaign during which the lighting of the most famous buildings and monuments of the world, such as the Eiffel Tower, Big Ben and the Colosseum, is switched off. Beijing is observing Earth Hour 2021 by powering off the Olympic Bird's Nest Stadium. It has since spread to more than 7,000 cities, with the world’s best-known landmarks keeping their lights off for one hour on this day every year. Earth Hour is an annual international event hosted...
