Nidhi Nagabhatla is a Programme Officer with the UN University – Institute for Water, Environment and Health.  She is a natural systems science specialist and a geospatial analyst and she has led, coordinated and implemented transdisciplinary projects and worked with multi-disciplinary research teams in various geographical regions and in varied thematic domains related to water and ecosystems, particularly in Asia, South Africa and West European regions. She has worked for more than 15 years with multiple international organizations (IWMI, World Fish Centre and IUCN), leading research and capacity development initiatives related to the themes of water and wetlands.Chris Metcalfe is a Professor in the School of the Environment at Trent University in Canada and he is also a Senior Research Fellow with the UN University – Institute for Water, Environment and Health.  At Trent University, he is the Director of the Institute for Watershed Science, which coordinates research and capacity building projects involving both academic and government researchers. His area of expertise is the environmental fate and toxic effects of contaminants in the environment, including research on the removal of contaminants in constructed and natural wetland systems.

• Chapter 1. Multifunctional Wetlands: An Overview of Pollution Abatement by Natural and Constructed Wetland Ecosystems.–  Chapter 2. Using Natural Wetlands for Municipal Effluent Assimilation: A Half-Century of Experience for the Mississippi Delta and Surrounding Environs.- Chapter 3. The Use of Natural Tundra Wetlands to Treat Domestic Wastewater in Canada’s Far North.- Chapter 4. The Long-term Use of Treatment Wetlands for Total Phosphorus Removal: Can Performance Be Rejuvenated with Adaptive Management?.– Chapter 5. An Investment Strategy for Reducing Disaster Risks and Coastal Pollution Using Nature Based Solutions.– Chapter 6. The Role of Constructed Wetlands in Creating Water Sensitive Cities.– Chapter 7. Methylmercury in Managed Wetlands.– Chapter 8. Growing Ornamental Flowers and Fish in Indigenous Communities in Mexico: An Incentive Model for Pollution Abatement Using Constructed Wetlands.– Chapter 9. Phytoremediation Eco-Models Using Indigenous Macrophytes and Phytomaterials.– Chapter 10. Accumulation of Metals by Mangrove Species and the Potential for Bioremediation.