The overall supply of water is finite, but demand for it has quadrupled in the last half-century. Water, it is said, is the new oil: wars arise over it; it’s fast growing expensive and seems overwhelmed by insatiable demand. Aquifers are falling, glaciers are melting, reservoirs are drying up and rivers no longer flowing to the sea.
Here in Asia, over 700 million have little or no access to clean drinking water. India faces particular water stress: its per capita water level has fallen dangerously close in recent years to the 1000 cubic metres base-line needed for basic survival.
Two solutions have arisen from the ground – one a retired Indian government engineer who has created artificial glaciers, and another a civil engineer who’s rallied his whole city around rainwater harvesting.