Choose the incorrect statement. 1) We are encouraged to plant more trees so as to ensure clean environment and also provide biomass fuel 2)Gobar-gas is produced when crops, vegetable wastes etc., decompose in the absence of oxygen 3)The main ingredient of biogas is ethane and it gives a lot of smoke and also produces a lot of residual ash 4)Bio-mass is a renewable source of energy

Options

A. We are encouraged to plant more trees so as to ensure clean environment and also provide biomass fuel
B. Gobar-gas is produced 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. Bio-mass is a renewable source of energy

Answer

C

Explanation

Encouraging to plant more trees we ensure clean and pollution free environment and it also provide bio-mass fuel. Gobar-gas is made from the decomposition of cow dung, crops, vegetable wastes, etc., decompose in the absence of oxygen.
The main ingredient of bio-gas is methane. It burns without smoke, leaves no residue like ash in wood, charcoal and coal burning. Bio-mass is living matter or its residues and is a renewable source of energy. Thus, part (c ) is the incorrect statement.