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Skiers speed down a ski slope with artificial snow in the middle of a snowless field, at 1600 meters above sea level, in the alpine resort of Villars-sur-Ollon, Switzerland, Saturday, December 31, 2022. The mild weather of the last few days in the Swiss Alps has disrupted the activity of alpine ski resorts below an altitude of 2200 meters above sea level. (KEYSTONE/Laurent Gillieron)