Science
Explain how the use of CNG in automobiles has reduced pollution in our cities.
Answer
The combustion of fuels such as coal, petrol and diesel results in the production of unburnt carbon particles and carbon monoxide gas, both of which are harmful pollutants that can enter the air and contribute to respiratory diseases. In contrast, Compressed Natural Gas (CNG) generates these harmful by-products in very less quantities, making it a cleaner fuel option. Consequently, the adoption of CNG has played a role in reducing pollution levels in our cities.
Related Questions
Fill in the blanks.
(a) Burning of wood and coal causes …………… of air.
(b) A liquid fuel, used in homes is ……………
(c) Fuel must be heated to its …………… …………… before it starts burning.
(d) The fire produced by oil cannot be controlled by ……………
List conditions under which combustion can take place.
Compare LPG and wood as fuels.
Give reasons.
(a) Water is not used to control fires involving electrical equipment.
(b) LPG is a better domestic fuel than wood.
(c) Paper by itself catches fire easily whereas a piece of paper wrapped around an aluminium pipe does not.