【TED演讲】对最近气候趋势的警告

Which of the following aspects can't indicate the condition of our climate change?
北极冰帽的气候变化是正常现象，不能据此推测出气候变化
 
According to the vedio,why people living in many places  will lack of drinking water?
当地居民饮用水源主要来自冰雪，而融化水的流量增加导致冰雪减少，进而影响到未来的水源。
 
From the video,which is  right about  the ads showed at last?
不存在clean coal一说。clean electricity 是王道。