India's Tata Group officials pose with the company's new "Nano" car during its launch at the 9th Auto Expo in New Delhi in this January 10, 2008 file photo. Priced at about $2,500, the Nano will cost about half the price of the cheapest car currently on the market. But some environmentalists are dreading the prospect of hundreds of thousands of low-cost cars hitting polluted and over-crowded roads around the world in the next few years. To match feature GREEN AUTOS REUTERS/Vijay Mathur/Files (INDIA)
REUTERS/VIJAY MATHUR