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CBSE Notes 2011-2012

Choose the incorrect statement

Multiple choice question

Choose the incorrect statement

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We are encouraged to plant more trees so as to ensure clean environment and also provide biomass fuel

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Gobar-gas is produced when crops, vegetable wastes etc., decompose in the absence of oxygen

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The main ingredient of biogas is ethane and it gives a lot of smoke and also produces a lot of residual ash

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Biomass is a renewable source of energy.