Methane-Powered Vehicles | NASA Spinoff
Australia's "Poo Powered Car" is BS - BestRide
fuel for thought: The First Natural Gas Vehicles
Gas Bag Vehicles - LOW-TECH MAGAZINE
Bio-Bug: Car run on human waste is launched
Natural gas vehicle - Wikipedia
On the Road to ANG Vehicles - Berkeley Lab – Berkeley Lab News Center
Natural Gas Cars! But How Do You Carry Enough Fuel? | Engineering.com
Methane gas. Kivu lake
Will natural-gas cars ever be suitable for consumer use? | HowStuffWorks
NREL study shows great advantage of natural gas and EVs
Are natural gas cars a real alternative? – Energuide
Dung Beetle: The methane gas powered car that leaves nothing to waste | Daily Mail Online
Alternative Fuels Data Center: How Do Natural Gas Vehicles Work?
Bosch: Gas-powered cars: CNG is not LPG | Automotive World
Dung Beetle: The methane gas powered car that leaves nothing to waste | Daily Mail Online
Natural gas not a 'bridge fuel' to cleaner trucks and cars – study - Transport & Environment
Alternative Fuels Data Center: How Do Natural Gas Vehicles Work?
Methane-Powered Cars : Fueled by Methane
Nathalie Is A Methane Powered Car That Recharges In 3 Minutes Flat, But Is It A Practical Car?
Fiat's tri-powered Multipla Multi-eco | Engadget
