The condition that indicates a polluted environment is:
Question:

The condition that indicates a polluted environment is:

  1. eutrophication

  2.  $0.03 \%$ of $\mathrm{CO}_{2}$ in the atmosphere

  3. BOD value of $5 \mathrm{ppm}$

  4.  $\mathrm{pH}$ of rain water to be $5.6$


Correct Option: 1

Solution:

The process in which nutrient enriched water bodies support a dense plant population which kill animal life by depriving it of oxygen results in subsequent loss of biodiversity is known as Eutrophication. So, this condition indicates a polluted environment.

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