Burning fuels such as diesel and coal release sulphur dioxide. It has corrosive effects and is also suffocative in nature. Acid rain is another serious problem which damages old monuments such as the Taj Mahal.
Oxides of nitrogen and sulphur are present in smoke emitted by vehicles. These combine with water vapour present in the atmosphere to form acids which are responsible for damaging soil, crops and buildings. This is the reason why the eco-friendly fuel CNG, is now being widely used in commercial vehicles, in India. The by-product of combustion of CNG is not harmful to the environment.
How the pollution in the cities can be reduced by the use of CNG in automobiles?

Options

A. It produces less amount of sulphur dioxide and chlorine.
B. It does not leave any residue or smoke after burning in the engine.
C. It produces large amount of carbon dioxide.
D. It is used in compressed form.

Answer

B

Explanation

CNG does not produce any pollutants.