Pashmina goats, source of the world's most valuable form of cashmere wool, are facing a growing threat from climate change. The goats roam the mountainsides of the Changtang plateau, 14,000 feet above sea level between Tibet and India, an arid landscape covered in seasonal grasses that have traditionally kept the goats fed. The landscape's winter weather has grown unstable in recent years, with the snowy season doubling in length and ...