Question

Eutrophication is associated with water pollution / air pollution

Answer 1

it is a water pollution

Answer 2

Eutrophication

The eutrophication of the Potomac River is evident from the bright green water, caused by a dense bloom of cyanobacteria.

Eutrophication (from Greek eutrophos, "well-nourished"),[1] or hypertropication, is when a body of water becomes overly enriched with minerals and nutrients that induce excessive growth of plants and algae. This process may result in oxygen depletion of the water body. One example is the "bloom" or great increase of phytoplankton in a water body as a response to increased levels of nutrients. Eutrophication is almost always induced by the discharge of nitrate or phosphate-containing detergents, fertilizers, or sewageinto an aquatic system.