Source: Exemplar
Choose the incorrect statement
Options
Option A
We are encouraged to plant more trees so as to ensure clean environment and also provide bio-mass fuel
Option B
Gobar-gas is produced when crops, vegetable wastes etc., decompose in the absence of oxygen
Option C is correct
The main ingredient of biogas is ethane and it gives a lot of smoke and also produces a lot of residual ash
Option D
Biomass is a renewable source of energy