Q.Why is there so much emphasis on changing over from petrol/diesel driven automobiles to CNG driven vehicles?
Ans. There is so much emphasis on changing over from petrol /diesel driven automobiles to CNG driven vehicles, because of the following reasons
(i)It does not produce smoke.
(ii) On burning CNG it produces C02 and water.
(iiii) It does not leave inburnt hydrocarbons, lead particulates etc., which pollute the environment.