Glacial Meltdown

1. Why are Himalayan glaciers melting so rapidly?
2. What human-interference factors could be aggravating glacial meltdown?
3. Can anything be done to arrest glacial melt?
4. What impact will glacial meltdown have, short-term and long-term?
5. Tibet is actually quite arid. Apart from glaciers, where is water stored?

WATCH BBC video, Himalayan glaciers under threat:
http://news.bbc.co.uk/2/hi/science/nature/8337207.stm