With river water fully used, Indian farmers have been trying to increase supplies by tapping underground reserves. In the last 15 years, they have bought a staggering 20 million Yamaha pumps to suck water from beneath their fields. Tushaar Shah, director of the International Water Management Institute’s groundwater research station in Gujarat, estimates those farmers are pumping annually to the surface 100 cubic kilometers more water than the monsoon rains replace. Water tables are plunging, and in many places water supplies are giving out.

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Source: http://www.garoweonline.com/artman2/publish/World_