- California Natural Gas Vehicle Coalition
 - Devoted to ensuring that California continues to set the pace in adopting this clean-burning transportation technology. - Honda Civic GX
- Powered exclusively by compressed natural gas (CNG) and certified as a Super-Low-Emission-Vehicle (SULEV) in California.
- International Association for Natural Gas Vehicles (IANGV)
- Information on natural gas vehicles and the international NGV industry.
- Natural Gas Vehicle Coalition
- A national trade association representing natural gas companies, equipment manufacturers, service providers and government entities interested in promotion of natural gas vehicles.
- NGV Global
- Includes natural gas vehicle (NGV) industry news, information, and commentary from around the world.
- NGV land
- Information on natural gas powered vehicles and refueling technologies, including Fuelmaker's Phill.
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