Question

Give reason : (a) Biogas is a cheap and eco-friendly fuel.

Answer 1

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• Biogas is cheap as it comes from the organic wastes such as , agricultural wastes , kitchen wastes , animal wastes etc. It is eco-friendly because it helps to reduce the greenhouse gas emissions and our dependency on fossil fuels which causes pollution.

Answer 2

Explanation:

Biogas is considered an ideal fuel because of the following reasons: (i) Biogas does not cause air pollution as the combustion process is smoke free. (ii) Biogas produces a large amount of heat per unit mass and thus has high calorific value. (iii) Biogas does not leave any residue on burning and is thus a clean fuel.