Natural gas vehicles (NGVs) are becoming a growing part of the public transportation market in North America, with cities like Los Angeles, New York City, Phoenix, San Francisco, Denver and Atlanta shifting their bus fleets to run on this cleaner, less expensive, domestic fuel. According to NGVAmerica, there are approximately 11,000 buses currently powered by natural gas in the US and one of four buses on order today will utilize CNG as a transportation fuel.
