UPSC Prelims 2022 Question:

Among the following crops, which one is the most important anthropogenic source of both methane and nitrous oxide?

Explanation: 

• Agriculture is estimated to account for 10%–20% of anthropogenic greenhouse gas (GHG) emissions worldwide. In 2005, it accounted for 50% and 60% of the total anthropogenic methane (CH4) and nitrous oxide (N2O) emissions, respectively. Rice paddies are considered one of the most important sources of methane and nitrous oxide emissions, which have attracted considerable attention due to their contribution to global warming.
  
  

Therefore, option (2) is the correct answer.

Subject: Geography| Agriculture and Allied Sectors(geo)