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Eutrophication in the Chesapeake Bay along the eastern edge of Maryland has resulted in low oxygen levels in the water and alternation of food webs. The cause of this eutrophication appears to be pollution that contains high levels of : 

(a) nitrogen and carbon 

(b) nitrogen and phosphorus 

(c) carbon and phosphorus 

(d) carbon, nitrogen and phosphorus

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Correct option: (b) nitrogen and phosphorus


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.

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