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UPSC 2021: Why is there a concern about copper smelting plants? 1. They may release lethal quantities of carbon monoxide into environment. 2. The copper slag can cause the leaching of some heavy metals into environment. 3. They may release sulphur dioxide as a pollutant. Select the correct answer using the code given below.
(a)1 and 2 only
(b)2 and 3 only
(c)1 and 3 only
(d)1, 2 and 3
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Not attemptedCorrect Answer: (b) 2 and 3 only
Copper smelters are major point sources of sulphur dioxide and their slag contains heavy metals that can leach into soil and groundwater, so statements 2 and 3 are correct. Carbon monoxide is not a principal pollutant of concern from these plants, making statement 1 incorrect. ([epa.gov](https://www.epa.gov/stationary-sources-air-pollution/primary-copper-smelting-new-source-performance-standards?utm_source=openai))
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Frequently Asked Questions
What is the correct answer to this UPSC 2021 Environment & Ecology question?▼
The correct answer is option (b): 2 and 3 only. Watch the detailed video explanation in our Sherlocking Prelims course on UnlockIAS.
Which year was this Pollution & Waste Management question asked in UPSC Prelims?▼
This question was asked in UPSC CSE Prelims 2021, GS Paper 1, as Question 17. It falls under Environment & Ecology > Pollution & Waste Management.
What is the difficulty level of this UPSC question?▼
This question is rated "moderate". It requires sound conceptual understanding of the topic.
How many UPSC Prelims questions have been asked from Pollution & Waste Management?▼
UPSC has asked 38 questions from Pollution & Waste Management (under Environment & Ecology) across multiple years. Visit the topic page to see the full list and year-wise trends.