Compressed natural gas is the same natural gas that is used in home heating, except that it has been compressed to 3600 psi in a high-pressure tank for use in a vehicle. CNG is the cleanest-burning of the commonly used alternative fuels. However, the space required for in-vehicle storage is prohibitive for some vehicles, limiting the availability of CNG for use in certain applications. The fueling infrastructure is also more complicated and expensive than that of other commonly used alternative fuels.

For more information on CNG, contact Tony Lindsay of Gas Technology Institute and CACC board member or visit www.afdc.energy.gov/afdc/fuels/natural_gas.html.