Compressed Natural Gas

Also referred to by its abbreviated name CNG, compressed natural gas may be used as a more environmentally-friendly fuel for vehicles converted for this purpose. This typically includes automobiles, but some school buses and trucks have also been converted to run on compressed natural gas. The gas is free of odor and color, and it is non-corrosive under pressure. Sources for natural gas include oil wells, coal bed methane wells and natural-gas-and-condensate wells.