The condition that indicates a polluted environment is.
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a
pH of rain water to be 5.6
b
eutrophication
c
0.03% of CO2 in the atmosphere
d
BOD value of 5 ppm
answer is B.
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Detailed Solution
Eutrophication is causing water pollution water overly enrched with minerals nutrients Which induce excessive growth of algae this process may result in oxygen content of water (D-O) decreased