Natural gas vehicles will never take off, the argument goes, because we just don't have the fueling infrastructure to support them. Try telling that to California, New York, and Oklahoma, the three states in the union with the most natural gas filling stations. In this video, Fool.com contributors Aimee Duffy and Tyler Crowe discuss the work that Clean Energy Fuels (NASDAQ:CLNE), ONEOK (NYSE:OKE), and Ford (NYSE:F) are doing to give Americans more options at the pump.