Electric cars are so 2006. French R&D firm MDI signed a deal this year with India's largest automaker, Tata Motors, to start manufacturing compressed-air-technology vehicles. These ultra-eco-friendly cars run on air, and the only thing they emit is colder, cleaner air. Another convenient feature: a built-in air compressor can be plugged in to refill the tanks within minutes.
Available: 2009
theaircar.com