Answer:
Biogas is produced from biomass
when it decays in the absence of oxygen in presence of bacteria in a biogas plant.
(1)
It is a better fuel than cow
dung cake because
(i) It is a clean fuel, produces
no smoke residue.
(ii) It has high calorific
value.
(iii) It helps in waste
disposal, even the left over slurry is used as manure. (2)
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