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.
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A hard Environment multiple-choice question from UPSC Prelims 2021. Attempt it above, then check the correct answer and detailed explanation below.
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Correct answer: B. 2 and 3 only
The concerns about copper smelting are the leaching of heavy metals from copper slag and the release of sulphur dioxide (2 and 3). Emission of lethal quantities of carbon monoxide is not a characteristic concern of copper smelting.
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