Comment : Compressed Natural Gas (CNG) is better than diesel

Explanation

CNG is considered a better fuel because it burns most efficiently, is cheaper and cannot be siphoned off by thieves and adulterated by petrol or diesel.
Use of CNG in automobiles because it burns more efficiently and little of it is left unburnt. It is also cheaper
Use of unleaded petrol
Use of catalytic converter in the vehicles as it reduces emission of poisonous gases.