Natural gas - is a type of organic fossil fuel. A naturally occurring mixture of hydrocarbon and non-hydrocarbon gases in porous formations beneath the Earth’s surface. It is a naturally occurring light hydrocarbon gas mixture consisting of methane in 90%, ethanol and a pair of high-order hydrocarbons. It is used as an energy source to heat buildings, generate electricity and to produce fuel and methanol.
Types of natural gas are:
• conventional gas
• unconventional gas