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

Choose the incorrect statement.A. We are encouraged to plant more tree

1.	Choose the incorrect statement.A. We are encouraged to plant more trees so as to ensure clean environment and also provide biomass fuel.B. Gobar-gas is produces when crops, vegetable wastes etc., decompose in the absence of oxygen.C. The main ingredient of biogas is ethane and it gives a lot of smoke and also produces a lot of residual ash.D. Biomass is a renewable source of energy.
Answer» Correct Answer - C The main ingredient of biogas is methane `(upto 75 %)` and it burns without smoke and leaves no ash.