Explanation:

Eutrophication is the enrichment of an ecosystem with chemical nutrients, typically compounds containing nitrogen, phosphorus, or both. Eutrophication can be a natural process in lakes, occurring as they age through geological time.In excessive amounts, however, nutrients cause a type of pollution called eutrophication. Eutrophication stimulates an explosive growth of algae (algal blooms) that depletes the water of oxygen when the the algae die and are eaten by bacteria.Scientists have recognized that nutrient enrichment was a threat to the bay. In 1987 formal goals were established to reduce nitrogen and phosphorous inputs to the bay from both point and non point sources.