Question

state two harmful effects caused by the excessive use of fertilizers

Answer 1

It causes water polution
It causes eutrophication

Answer 2

excessive air water borne nitrogen from fertilizers may causerespiratory ailments, cardiac disease, and several cancers, as well as can "inhibit crop growth, increase allergenic pollen production, and potentially affect the dynamics of several vector-borne diseases, including West Nile virus, malaria, and cholera ...