Acid deposition has caused the fish to die because the mechanism of acid deposition in the lake causes an algal bloom that decreases oxygen levels in the water.
What is Acid deposition?
Acid deposition may be defined as the process of formation of precipitation with acidic components, such as sulfuric or nitric acid that plunge to the ground from the atmosphere in moist or dry forms.
Acid deposition also alters the normal pH of the water body which is safe for the survival of the fish population.
Therefore, it is well described above.
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