Q. How CNG is a cleaner fuel?

1. It produces oxides of Sulphur and Nitrogen in very small amounts.
2. It makes environment less polluted.
3. It emits less greenhouse gases.

Select the correct answer from the codes given below:
Answer: All of the above
Notes: Compressed natural gas is a fuel that can be used as a substitute for other fuels like petrol and diesel. When the gas is burnt, the quantity of carbon dioxide that is burnt is half of what is emitted when coal or other fossil fuels are burnt. Other pollutants like sulfur oxide, nitrogen oxide and particulate matter are also emitted in lesser quantities. Thus, the atmosphere is relatively cleaner when this gas is used. Hence, CNG is called clean fuel.