Question

how does biogas plant help to reduce the problem of pollution?​

Answer 1

the biodegradable waste can be used to produce methane after decomposition which is used as fuel

Answer 2

Biogas is a renewable, as well as a clean, source of energy. Gas generated through biodigestion is non-polluting; it actually reduces greenhouse emissions (i.e. reduces the greenhouse effect). ... Biogas generation helps cut reliance on the use of fossil fuels, such as oil and coal.