Steven Chu shared the Nobel Prize winner in Physics a decade ago. He said that the growth in global warming could cause severe shortage of water in cities. "(Water) is probably the first thing that will hit home," Chu said. "The water storage problem is becoming a mess."
The current average temperature of Earth is 3 degree Centigrade. Because of the Global warming The Sierra Nevada mountain range of California will see its snowpack decay by 30-70% in 100 years. Some companies have invested in desalinizing sea water for human consumption because of the alarming situation of global warming.

BOTTOM LINE : Loss of usable water due to Global warming will caused devastating effect on human race.