Question

how does ammonia poisining happen in rivers???​

Answer 1

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Chemical fertilizers can run off into the water bodies, depleting the dissolved oxygen and increasing the ammonia content. This makes it different for fish to breathe. This is called ammonia poisining.

Answer 2

Explanation:

Ammonia poisoning happens when a fish tank's ph levels become elevated, offsetting the nitrogen cycle. 1 In ideal water conditions, ammonia levels should be nonexistent. ... Even the smallest amount of ammonia can cause gill damage in fish and extremely high levels are oftentimes fatal.