Petroleum - simple words, simple terms

Petroleum

                           As we know that every automobile needs fuels like petrol or diesel to work. Those petrol and diesel are obtained from the natural resource called petroleum.

                                                                   CnH2n+2

Generally, this petroleum is considered as mixture as it has various elements like hydrogen, carbon, nitrogen, oxygen, sulfur and some metals in it.

This Petroleum is a natural resource that buried underground for many years,