In the context of solving pollution problems, what is/are the advantage/advantages of bioremediation technique? 1. It is a technique for cleaning up pollution by enhancing the same biodegradation process that occurs in nature. 2. Any contaminant with heavy metals such as cadmium and lead can be readily and completely treated by bioremediation using microorganisms. 3. Genetic engineering can be used to create microorganisms specifically designed for bioremediation. Select the correct answer using the code given below:
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A hard Environment multiple-choice question from UPSC Prelims 2017. Attempt it above, then check the correct answer and detailed explanation below.
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Correct answer: C. 1 and 3 only
Statements 1 and 3 are correct — bioremediation enhances natural biodegradation, and genetically engineered microorganisms can be designed for it. Statement 2 is wrong — heavy metals like cadmium and lead cannot be degraded/completely treated by microorganisms. So 1 and 3 only — option (c).
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