Question

biogas is an eco-ftiendly fuel

Answer 1

CNG because it is biogas without CO2, H2s and other impurities. it is upgraded biogas

Answer 2

Biogas is an eco-friendly fuel. Explain.

1. It doesn't leave any ash after burning.
2. It burns with smokeless flame.
3. It has higher calorific value than dung-cake, wood & coal.
4. It is much cheaper than most of the common fuel.
5. Use of Biogas as a fuel will save forests & fossil fuels.