Compressed natural gas (CNG) vehicles have been around a while and have had a great deal of success — look at all those NYC Crown Vic cabs adapted to use CNG. Though the fuel is abundant and relatively cheap, one of the biggest limiting factors has always been how to package the bulky cylindrical tanks used to store …

America is in the midst of the biggest energy boom since Texas' 20th Century Gusher Age. All over the country, new drilling techniques have created an abundance of cheap natural gas. With domestic production at more than 25 billion cubic feet per day, prices are as low as they've ever been.

Solutions to modern problems sometimes can be found in a distinctly classical place. The Magnolia Special was built to recapture the grace and romance of 1930s European roadsters — internal combustion and all — yet it emits 40% less CO2 than an equally powerful gas-burning automobile. And it does this using technology…

Billionaire T. Boone Pickens tried to convince the world CNG was the fuel of the future, but the possibility of a Civic-heavy future excited no one. He should have started the conversation with this — the Speedriven 800-hp CNG-powered V12 Mercedes roadster.

This Factory Five '33 Ford wears a very loud shade of Lamborghini green, but it's not just posing, it's green enough to turn anyone envious. Under the hood's a CNG-fueled LS7 exhaling at 650 HP though four catalytic converters.