India, April 19 -- India is like a different planet when it comes to water. Four unique issues intersect here: 1) the Third Pole melting, putting at risk the largest freshwater sources for about a quarter of the world's population; 2) a changing monsoon that threatens to shrink rivers further; 3) our use of groundwater; India now draws about 25% of all groundwater extracted worldwide, in an effort to feed crops that, in many cases, shouldn't be growing in the water-stressed regions they cover); and 4) a uniquely high population and unique levels of population density in poorly governed cities that drain entire regions of water (much of which then goes to waste). Where do we go from here, given that the clock is running out (groundwater extr...