Answer:
D. Excess nutrient levels
Explanation:
Although some aspects of global climate change are disputed, most scientists agree that increased concentrations of atmospheric carbon dioxide due to the burning of fossil fuels have increased sea surface temperatures and the frequency of severity of major storms. In addition, increased amounts of dissolved carbon dioxide has lowered ocean pH by about 0.1 unit in the past 200 years.
Excess nutrient levels are caused primarily by local development rather than global climate change. Nutrients are released into coastal waters by activities such as logging, agriculture, and the release of untreated sewage.
