(a) Classify the two fuels – CNG and hydrogen – as renewable and non-renewable.

(b) Justify the statement, “Hydrogen is a cleaner and better fuel than CNG”.

(a) CNG-compressed natural gas. It is a type of natural gas which is a non- renewable source of energy as it takes thousands of years to get replenished. Thus CNG is a non-renewable source while hydrogen is a renewable source.

(b) Hydrogen is a much cleaner fuel than CNG because-


there is no hydrocarbon emission from hydrogen while CNG produces a lot of hydrocarbon emission which can cause pollution.


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