For most of the year, Rajasthan is so dry, people use sand to clean their dishes. But during monsoon season, there is plenty of rain – enough water to last villages for an entire year if they could capture enough of it.
Agrawal invented a way to do that, a water collection system called Aakash Ganga – Hindi for “River from the Sky” – which now supplies 10,000 people with year-round clean, healthy drinking water.
A public-private partnership rents rooftops and sets up collection networks of pipes and underground storage tanks. Part of the rain captured by his system goes to the homeowner, the rest through a series of pipes to community reservoirs.
In the villages where he’s deployed the rain harvesting systems, overall health has improved and dairy cattle are producing twice as much milk.
His work has made Agrawal one of CNN’s Top Ten Heroes of the Year.