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.
Hydrogen-a very special type of gas. Liquefied natural gas (LNG) - natural gas that is very, very cold. Liquefied petroleum gas (LPG) - hydrocarbon gases under low pressure. Liquids made from coal-gasoline and diesel fuel that doesn't come from petroleum.NG is made by refrigerating natural gas to condense it into a liquid. The liquid form is much more dense than natural gas or CNG. It has much more energy for the amount of space it takes up. So, much more energy can be stored in the same amount of space on a car or truck.