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A pesticide which is a chlorinated hydrocarbon is sprayed on a food crop. The food chain is: Food crop – Rat – Snake – Hawk. In this food chain, the h
Consider the following: 1. Oxides of Hydrogen 2. Oxides of Nitrogen 3. Oxides of Sulphur Which of the above causes/cause acid rain?
The correct answer is option (b): UN Conference on Environment and Development, Rio de Janeiro, 1992. Watch the detailed video explanation in our Sherlocking Prelims course on UnlockIAS.
This question was asked in UPSC CSE Prelims 2010, GS Paper 1, as Question 56. It falls under Environment & Ecology > International Environmental Treaties & Summits.
This question is rated "easy". It tests basic recall and most well-prepared aspirants should answer it correctly.
UPSC has asked 39 questions from International Environmental Treaties & Summits (under Environment & Ecology) across multiple years. Visit the topic page to see the full list and year-wise trends.