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प्रश्न
The question has four options. Choose the correct answer:
Most harmful type of environmental pollutants are
विकल्प
human organic wastes
natural nutrients in excess
waste animal feed
non-biodegradable chemicals
उत्तर
non-biodegradable chemicals
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संबंधित प्रश्न
Describe the usefulness of incineration of wastes, and also mention the precautions required in it.
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The question has four options. Choose the correct answer:
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The question has four options. Choose the correct answer:
Which one is biological in sewage treatment?
The question has four options. Choose the correct answer:
BOD is
