Innovative India water plant opens in Madras
A desalination plant which begins operating in Madras on Saturday will provide some of the cheapest drinking water in India, backers say.
They say that the plant will supply 1,000 litres of drinking water for just over $1 and could well be a "template" for other coastal Indian cities.
The company behind the plant says that it is the biggest in South Asia.
It will provide 100 million litres of water a day to the city by filtering sea water under high pressure.