Natural gas is a gaseous mixture of natural hydrocarbons composed mainly of methane, but often including varying amounts of other higher alkanes, and sometimes a small percentage of carbon dioxide, nitrogen and hydrogen sulfide. Fossil fuels are made from decomposing plants and animals, and this fuel is found in the earth's crust and contains carbon and hydrogen that can be burned to produce energy, but natural gas is more efficient than other traditional fuels, less polluting it emits fewer greenhouse gases than other countries is an abundant and important source of energy, non -renewable and easily transported. In addition, natural gas provides heat for cooking and heating,as well powers the power plants homes and businesses. Natural gas powers many industrial processes that produce materials and goods ranging from glass to clothing, and it an important part of products such as paints and plastics.