Rajendra Singh has devoted his life to solving India 's water problem . Rajasthan is India 's largest state and also one of the driest . Singh says rainwater is a resource we can not afford to waste . There was no way I could earn any money here . A thousand water harvesting structures have been built in the last 30 years .
Rajendra Singh has devoted his life to solving India 's water problem . Rajasthan is India 's largest state and also one of the driest . Singh says rainwater is a resource we can not afford to waste . A thousand water harvesting structures have been built in the last 30 years .