Weather Watch

Winter Olympics Host Italy Fires Up Snow Cannons for Alpine Skiers

Artificial snow has become an essential insurance policy for ski resorts worldwide as global warming shortens winter seasons and makes conditions increasingly unpredictable.

TechnoAlpin snow cannons in Livigno, Italy.Photographer: Mattia Ozbot/Getty Images
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When downhill ski favorite Marco Odermatt races down the Stelvio run at the Winter Olympics on Saturday, he will glide across a mix of real and artificial snow.