Among the following crops, which one is the most important anthropogenic source of both nitrous oxide and methane? (UPSC CSE Prelims 2022 GS Paper-1)

A. Cotton

B. Rice

C. Sugarcane

D. Wheat

Solution: B

Some of the anthropogenic source of methane includes rice paddies, coal mining, biomass burning, domestic sewage treatment, animal wastes, landfills, etc.

The anthropogenic sources of nitrous oxide includes cultivated soils, biomass burning, stationary combustion, human sewage, etc.

Hence, option (B) is correct.

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