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.…

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