By the end of 2002 the public transport of Delhi switched over to a new fuel. Name the fuel. Why is this fuel considered better? Explain. (3)
CNG(Compressed Natural Gas) is considered better because of the following reasons:
(i) CNG burns more efficiently unlike diesel or petrol.
(ii) Very little of it is left unburnt.
(iii) It can not adulterated.
(iv) It is cheaper than petrol or diesel. (3)