We are grateful for sponsorship and support from the following agencies and organizations:

• United States Department of Agriculture – CSREES NRI Air Quality Program
• National Science Foundation – Atmospheric Chemistry Program
• Phosphate and Potash Institute / The Fertilizer Institute
• U.S. Environmental Protection Agency
• North Carolina Division of Air Quality
• Environmental Defense
• Kenan Institute
• Center for the Environment, Purdue University
• United States Department of Agriculture – Agricultural Research Service
• Air and Waste Management Association
• North Carolina State University
• Nicholas School of the Environment and Earth Sciences, Duke University
• Water Resources Research Institute
• Ecological Society of America
• North Carolina Animal and Poultry Waste Management Center
• Indo-US Science and Technology Forum