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Extensive use of chemical fertilizers may lead to eutrophication of nearby water bodies.

1. Methyl isocyanate is a colourless highly flammable liquid that evaporates quickly when exposed to the air. It has a sharp, strong odour. This is used in the production of pesticides, polyurethane foam, and plastics.
2. Exhaustible resources are those natural resources that are likely to be exhausted due to their continuous use. Forest is a renewable exhaustible resource that can be produced again and again. Coal, petroleum and minerals are non-renewable exhaustible natural resources that cannot be produced again.
3. Extensive use of chemical fertilizers may lead to eutrophication of nearby water bodies.
4. The concentration level of lead in blood is about 25 μg/100 ml. So any value above this is considered alarming.

Correct answer: Extensive use of chemical fertilizers may lead to eutrophication of nearby water bodies.

Solution

Option C is correct because eutrophication is caused by the excessive use of chemical fertilizers, which leads to nutrient enrichment in water bodies, promoting algal blooms and oxygen depletion.

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