Question

why bio gas is considered to be a clean fuel​

Answer 1

• biogas or biofuel is called a clean fuel because it does not produce any residue or any kind of harmful gases at the time of combustion. It is made up of 75 % of methane which is a clean gas. On combustion this gas does not produce the harmful gas carbon dioxide which is CO2., or other greenhouse gases.
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Answer 2

Answer:

1. biogas or biofuel is called a clean fuel because it does not produce any residue or any kind of harmful gases at the time of combustion.
2. It is made up of 75 % of methane which is a clean gas. On combustion this gas does not produce the harmful gas carbon dioxide which is CO2., or other greenhouse gases.