How Is global warming on the Himalayas a threat for Asian water?

Answer 1

The Ganges and the Indus Rivers, and many smaller ones in Pakistan, India, Bangladesh and Burma and are all fed with melting water from the Himalayas. The water comes from glaciers in the mountains. If global warming melts the glaciers in the Himalayan Mountains as it is beginning to, then these great rivers, that millions of people rely on, will dry up.

Global warming through human emissions are particularly noted in this area as tourists bring fuels in and the tourist trade itself is blamed for a great deal of the melting of these glaciers. (see link)