Prevalence in the context refers to the commonness or frequency of acid rain occurrence in the rainforests of South America, causing damage to trees and fish populations.
Prevalence in the context provided means the commonness or frequency of something. In this case, it refers to the widespread occurrence of acid rain in the rainforests of South America, leading to damage to trees and fish populations. Acid rain, a low-pH precipitation resulting from atmospheric pollutants combining with water, has been a significant issue affecting ecosystems worldwide.
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