Like the millipedes, centipedes are highly segmented (15 to 177 segments), but with only one pair of walking legs per segment (millipedes have two legs per segment). The head of a centipede has a pair of antennae, jaw-like mandibles (called forcipules) and other mouthparts.
Although compressed natural gas (CNG) is a fossil fuel like diesel, gas and coal, it is far different in terms of its impact on the natural environment.
In the US compressed natural gas (CNG) is used in rural homes without connections to piped-in public utility services, or with portable grills. [citation needed] Natural gas is also supplied by independent natural gas suppliers through Natural Gas Choice programs throughout the United States.