Among the following crops, which one is the most important anthropogenic source of both methane and nitrous oxide?
✓ Correct answer: b) Rice
ExplanationMethane (CH4) and nitrous oxide (N2O) are the two most important GHGs after carbon dioxide (CO2).The most rap- id increase in CH4 emission was found in natural wetlands and rice fields due to increased rice cultivation area and climate warming.N2O emission increased substantially in all the biome types and the largest increase occurred in upland crops due to increasing air temperature and nitrogen fertilizer use.Rice pad- dies are considered one of the most important sources of CH4 and N2O emissions, which have attracted considerable attention due to their contribution to global warming.Environment and Ecology 481 46
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