Tata Company Chairman Ratan Tata with his $2,500 car: The Nano is expected to provide millions of Indians with their first opportunity every to buy a car. Critics are warning of the consequences the Tata Nano's introduction could have for India's clogged roads and for the climate. In December, the United Nations' chief climate scientist, Rajendra Pachauri, warned that the ultra-cheap car was creating nightmares for him.