eutrophication
noun [ U ] environment specialized uk/ˌjuː.trə.fɪˈkeɪ.ʃən/ us/ˌjuː.trə.fɪˈkeɪ.ʃən/
（水体）富营养化
the addition of nutrients to water in lakes and rivers, which encourages plant growth that can take oxygen from the water and kill fish and other animals
Massive use of fertilizers contributes to the eutrophication of rivers and lakes. 大量使用化肥导致河流和湖泊富营养化。