Natural gas may be a present organic compound gas mixture consisting of methane series and unremarkably includes numerous amounts of different higher alkanes, and generally a tiny low share of greenhouse gas, nitrogen, sulphide, or helium. Fossil fuel is colourless and inodorous; therefore a sulphur-smell (similar to rotten eggs) is typically further for early detection of leaks. Natural gas may be a fuel. it’s fashioned once layers of mouldering plant and animal matter area unit exposed to intense heat and pressure beneath the surface of the planet over many years. The energy that the plants originally obtained from the sun is keep within the variety of chemical bonds within the gas. Natural gas is usually praised as a clean energy various. It burns a lot of cleanly than different fossil fuels, emitting lower levels of harmful emissions like monoxide, greenhouse emission and azotic oxides.