Assertion : Methane,a component of greenhouse | vedclass

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(A) Methane is produced by incomplete biomass combustion and anaerobic decomposition by methanogens.Carbon dioxide contributes about $60\%$ to total g

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If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.

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(A) Methane is produced by incomplete biomass combustion and anaerobic decomposition by methanogens.Carbon dioxide contributes about $60\%$ to total global warming,while methane $(CH_4)$ and chlorofluorocarbons $(CFCs)$ contribute $20\%$ and $14\%$ respectively.Nitrous oxide $(N_2O)$ contributes $6\%$ to total global warming.Efficient engines,such as multi-point fuel injection engines,improve combustion efficiency,thereby reducing the emission of unburnt hydrocarbons like methane in automobile exhausts.Therefore,both the Assertion and the Reason are correct,and the Reason explains why methane emissions from vehicles are controlled.

Assertion : Methane,a component of greenhouse gases,contributes about $20$ percent to global warming.
Reason : The introduction of multi-point fuel injection engines in automobiles has decreased methane content in the exhausts.

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Assertion : Methane,a component of greenhouse gases,contributes about $20$ percent to global warming.Reason : The introduction of multi-point fuel injection engines in automobiles has decreased methane content in the exhausts.