Natural gas is a mixture consisting of hydrocarbons with a light molecular weight, such as methane (CH4), ethane (C2H6) and propane (C3H8). It can be found underground, alone or with petroleum. Similar to petroleum, natural gas is located in microscopic pores of rocks, and reaches to production wells, flowing through rock. Natural gas is resolved on the surface and heavy hydrocarbons contained therein (butane, pentane, etc.) are removed. Natural gas is the cleanest fossil fuel used in our homes. When natural gas burns, carbon dioxide, water vapour and nitrogen oxides form.
