Solved UPSC CDS/OTA Question
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Q · Climate ChangeMedium · 45s
Which country is the largest historical emitter of CO₂?
TopicClimate Change
Question Typemultiple choice
DifficultyMedium
Marking+1 / −0.33
Test Duration30 min
Step-by-Step Solution
The complete worked solution.
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The USA has contributed the most cumulative CO₂ historically.
Final Answer: Option B - USA