Rainwater harvesting in bangalore

Many old homes turn to rainwater harvesting as the law kicks in. Over 100,000 installations are expected to happen in the next 1 year with a harvesting potential of 10000 million litres annually .

Here is one example done even before the law by a conscientious citizen

http://www.youtube.com/watch?v=Fk48fJTSTAY&feature=related