Name four gases commonly present in biogas. State two advantages of using this gas over fossil fuels.
The typical gases present in biogas are as follows:
2. Carbon Dioxide
4. Hydrogen Sulphide
Biogas is more efficient as fuel as compared to fossil fuels in the following ways:
1. Biogas does not leave any ash and residue after combustion.
2. Biogas does not burn with a smoke and does not cause pollution.