Greener snowmaking is helping ski resorts tackle climate change

As a warming world creates an existential threat for the ski industry, resorts are reducing how much energy they need to make it snow

Trudging across the top of Bromley Mountain Ski Resort on a sunny afternoon in January, Matt Folts checks his smartwatch and smiles: 14 degrees fahrenheit. That is very nearly his favorite temperature for making snow. It's cold enough for water to quickly crystallize, but not so cold that his hourslong shifts on the mountain are miserable.

Folts is the head snowmaker at Bromley, a small ski area on the southern end of Vermont's Green Mountains. The burly 35-year-old sports a handlebar moustache, an orange safety jacket, and thick winter boots that crunch in the snow as he walks. A blue hammer swings from his belt.