Question

) Write two points of difference between coal and CNG.​

Answer 1

Answer:

Natural gas is a fossil fuel, though the global warming emissions from its combustion are much lower than those from coal or oil. Natural gas emits 50 to 60 percent less carbon dioxide (CO2) when combusted in a new, efficient natural gas-power plant compared with emissions from a typical new coal plant

Answer 2

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Answer:

CNG - Compressed Natural gas

Compressed natural gas is a fuel gas made of natural gas, which is mainly composed of methane, 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, usually in cylindrical or spherical shapes.

CFCs - Chlorofluorocarbons

Chlorofluorocarbons (CFCs) are nontoxic, nonflammable chemicals containing atoms of carbon, chlorine, and fluorine.

They are used in the manufacture of aerosol sprays, blowing agents for foams and packing materials, as solvents, and as refrigerants.