The Olympics' artificial snow requires the equivalent of a day's worth of drinking water for 900 million people. Experts say it's the unfortunate future of winter sports.

When it comes to hosting the Winter Olympics, Beijing has a major problem: no snow. So in 2018, the Chinese capital recruited an army of machines — 100 snow generators and 300 snow guns — to fill its arid mountainsides with fake snow for the world's top athletes. This solution isn't unique to Beijing. The snow for the 2014 Games in Sochi, Russia, was 80% artificial, and Pyeongchang's snow in 2018 was more than 90% synthetic.

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