Critically review the published literature concerning the performance effectiveness of constructed wetlands in the treatment processes for contaminant removal eg suspended solids, BOD, nutrients, pathogens. You may choose to focus on only ONE contaminant. You must choose either wastewater effluent wetlands or stormwater treatment wetlands. You must give examples from atleast 5 case studies published in the literature. You must consider the strengths and weaknesses ofthese engineered ecotechnologies, and briefly discuss the benefits and limitations of using constructed wetlands as a water treatment technology. Your report must be adequately referenced using the Harvard System to demonstrate knowledge of the key published literature.