eutrophication
noun /ˌjuːtrəfɪˈkeɪʃn/
/ˌjuːtrəfɪˈkeɪʃn/
[uncountable] (specialist)- the process of too many plants growing on the surface of a river, lake, etc., often because chemicals that are used to help crops grow have been carried there by rain
（常因雨水带来的化肥造成水体的）富营养化