Methane an air pollutant is produced ______.1). by action of ultraviol – InterviewSolution

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1.	Methane an air pollutant is produced ______.1). by action of ultraviolet light on nitrogenous compounds.2). as a by-product of manufacturing ammoniacal fertilizers3). by burning of coal in insufficient air4). by digestion of food by animals
Answer» by digestion of food by animals is the CORRECT ANSWER as per the SSC answer key

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