CRUDE OIL-HEAVY CRUDE OIL
Crude oil or petroleum is a thick, flammable liquid of burnt brown or dark green, or black that is found in the upper layers of parts of the Earth’s crust. The oil contains a complex mixture of different hydrocarbons. Most of these hydrocarbons are from the alkane chain; But inwardly, composition or purity may vary greatly. Oil is called black gold. Oil is considered a fossil fuel and is non-renewable.