Eutrophication?

Eutrophication is a process in which a body of water becomes overly enriched with nutrients, leading to excessive growth of algae and other aquatic plants. This can result in decreased oxygen levels in the water, which can harm fish and other aquatic organisms. Eutrophication is often caused by runoff of fertilizers from agricultural fields, sewage discharge, and other human activities that introduce high levels of nutrients into water bodies.