CNG and LPG are widely used because they:
ABurn cleanly with less smoke and pollution than wood or coal
BProduce no carbon dioxide
CAre completely renewable
DAre cheaper than petrol always
Answer & Solution
Correct answer: A. Burn cleanly with less smoke and pollution than wood or coal
CNG and LPG burn more completely than wood or coal, producing less smoke, particulate matter, and harmful gases. They still release CO₂, and they are not renewable (both are obtained from petroleum/natural gas).
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