Compressed natural gas

Fuel gas mainly composed of methane

Compressed natural gas (CNG) is a fuel gas made of petrol which is mainly composed of methane (CH4), compressed to less than 1% of the volume it occupies at standard atmospheric pressure. It is stored and distributed in hard containers at a pressure of 20–25 MPa (2,900–3,600 psi), usually in cylindrical or spherical shapes.

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