Reuters: India’s "People’s Car" has yet to be unveiled and the advertising campaign has not even begun, but some Indians are already raving about Tata Motor’s new US$2,500 car — despite the fears of environmentalists. "I am really excited and definitely buying the cheapest car in the world as soon as they launch it," said Arindam Sapui, a rice trader in Burdwan, a small town in West Bengal in eastern India. This is exactly the kind of unbridled enthusiasm that …