BBC: With a hard pledge on peaking carbon emissions and with ever more ambitious targets on installing renewables, China has become one of the countries to watch at this week's Paris conference. The Qinghai Tibet plateau is the heart and lungs of Asia. Here, the continent's weather is made and its great rivers are born. The altitude and the cold make it one of the most extreme climates on earth. When I visited, icy winds gusting at 50mph (80km/h) were whipping a sandstorm into Qie Qun Jia's face as...