Question

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Answer 1

1. Bio-gas is shown in above picture
2. No, this source of energy doesn't cause pollution because combustion of biogas, like natural gas, produces carbon dioxide (CO2), a greenhouse gas, the carbon in biogas comes from plant matter that fixed this carbon from atmospheric CO2. Thus, biogas production is carbon-neutral and does not add to greenhouse gas emissions
3. two advantage of bio-gas is

• bio-gas burns leaving no gas emissions
• slurry is left which is used as an excellent manure

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