CNG, LNG is good for trucks, buses, taxis and utility car fleets. 3500 psi CNG (or high pressure hydrogen) is very dangerous for ordinary consumer passenger cars. Even the utility pros at the recent Kansas City screwed up and said they had the area safe after their construction break. A little bit later the restaurant exploded and several other buidings were damaged.
You with the thumbs down are ignoring how careless the average person is and you are only thinking of your stock price. Plugin electric/gasoline hybrids are the best way to go for the average consumer, of which tthe Chevrolet Volt and the Ford Fusion are the best.