The document discusses how constructed wetlands can help address coastal pollution by reducing excess nutrients from stormwater runoff and wastewater. Constructed wetlands use shallow and deep cells to effectively remove nitrogen, phosphorus, and pathogens below regulatory limits. They also improve dissolved oxygen levels and reduce organic carbon. Well-designed constructed wetlands generate community support as amenities and produce revenue from harvesting wetland plants for renewable energy like ethanol. This dual role of improving water quality while creating assets ensures the long-term sustainability of constructed wetlands in protecting coastal resources.