Question

excessive use of fertilizer in crop land cause air one of the cause of algal bloom give reason
plz its urgent ​

Answer 1

Answer:

Algal bloom are caused by eutrophication. Eutrophication is the leaking of fertilizers from crop land into rivers due to rain. This causes algae to bloom in rivers covering the river surfaces and hence not allowing oxygen to dissolve in water. This causes the death of fish present in the water.

Answer 2

Explanation:

Algal bloom are caused by eutrophication. Eutrophication is the leaking of fertilizers from crop land into rivers due to rain. This causes algae to bloom in rivers covering the river surfaces and hence not allowing oxygen to dissolve in water.