48. Member NC Breathe Planning Committee “Environmental Justice in North Carolina”, Wilmington, NC, April 11, 2019.
47. “Air Pollution in Kerala, South India”, International Conference on Air Pollution and Monitoring (ICAM 2019), Kottayam, Kerala, India, March 8-11, 2019.
46. International Advisory Scientific Committee Member “International Congress on Environment and Health”, Adana, Turkey, October 23-25, 2017.
45. International Advisory Committee Member “First International Conference on Environment Management and Sustainability (ICEMS- 2017)”, Navi Mumbai, India, January 4-6, 2017.
44. Member Scientific committee for the “1st International Electronic Conference on Atmospheric Sciences”, July 16-31, 2016. http://sciforum.net/conference/ecas2016
43. “Agricultural Mapping, Monitoring, and Data Visualization for a Changing Global Environment, 2011 AGU Fall Meeting, San Francisco, CA, December 5, 2011.
42. Workshop Chair, “US-India Air Quality and Climate Research Workshop”, Hyderabad, India, September 12-15, 2011.
41. Meeting Chair, “US-India International Workshop: Collaborative Science, Research, and Education in Air Quality Measurements, Modeling and Analysis”, Hyderabad, India, March 14-24, 2011.
40. “Plant Response to Environmental Pollution”, Fourth International Conference on Plants and Environmental Pollution (ICPEP-4), Lucknow, India, December 8-11, 2010.
39. “Climate Change”, Fourth International Conference on Plants and Environmental Pollution (ICPEP-4), Lucknow, India, December 8-11, 2010.
38. “Meeting Co-Chair, “Environmental Health and Technology, EH&T 2010”, International Conference, Kanpur, India, March 15-17, 2010.
37. “International Congress on Recent Advances in Environmental Science & Technology (RAEST)” Banaras Hindu University, India, November 2-4, 2009.
36. “Managing Ammonia Emissions”, U.S. Environmental Protection Agency, Science Advisory Board, Integrated Nitrogen Committee Workshop, Washington DC, October 20 – 21, 2008.
35. “Particulate Matter in and from Agriculture”, International Conference, Braunscheweig, Germany, September 3-4, 2007.
34. Meeting Co-chair, “Air Quality in the Agricultural Landscape: Measurements, Modeling, BMPs, and Emerging Regulations”, ASA-CSSA-SSSA International Annual Meetings in Indianapolis, November 13-16, 2006.
33. Workshop Chair, “Workshop on Agricultural Air Quality: State of the Science”, Potomac, MD, June 5-8, 2006.
32. “International Perspectives in Agricultural Air Quality”, Workshop on Agricultural Air Quality: State of the Science, Potomac, MD, June 5-8, 2006.
31. “Deposition”, Particulate Matter Supersites Program & Related Studies, An International Specialty Conference Sponsored by the American Association for Aerosol Research, Atlanta, GA, February 7-11, 2005.
30. “Estimates of N and S Deposition”, 2004 National Atmospheric Deposition Program -Scientific Symposium, Halifax, Nova Scotia 22-24 September 2004.
29. “Deposition of Air Pollutants”, 13th World Clean Air and Environmental Protection Congress and Exhibition, London, U.K., August 22-27, 2004.
28. “Ozone Precursors, Fugitive, Workplace, and Area Source Monitoring”, Symposium on Air Quality Measurement Methods and Technology, Research Triangle Park , NC , April 19-22, 2004.
27. “Dust Storms and Their Effects on Human Health”, Sino-US Workshop, Raleigh, NC, November 25-26, 2002.
26. “Airborne Water Pollutants and Atmospheric Water”, Water Resources Institute Annual Meeting, Raleigh, NC, April 9, 2002.
25. “Atmospheric Issues Related to Nitrogen”, Future Directions on Air Quality Research, Research Triangle Park, NC, February 12-15, 2001.
24. “Air-Surface Emissions and Gas Fluxes”, 2000 Annual Meeting and International Conference of the American Institute of Hydrology, Research Triangle Park, NC, November 5-8, 2000.
23. “Ammonia Emissions”, International Symposium on the Measurement of Toxic and Related Air Pollutants, Research Triangle Park, NC, September 12-14, 2000.
22. “Photochemical Oxidants,” The Sixth International Conference on Air-Surface Exchange of Gases and Particles, Edinburgh, UK, July 3-7, 2000.
21. “Workshop on Air Quality Index and Emission Inventory Development for Delhi ”, New Delhi, India, June 6-8, 2000.
20. “Atmospheric Nitrogen Compounds II: Emissions, Transport, Transformation, Deposition, and Assessment”, Chapel Hill , NC , June 7-9, 1999.
19. “Ozone,” EPA/AWMA International Symposium on Measurement of Toxic and Related Air Pollutants, Cary, NC , September 1-3, 1998.
18. “Air Quality Modeling,” 91 st Air & Waste Management Association Annual Meeting, San Diego, CA, June 14-18, 1998.
17. “Project NOVA — Natural emissions of Oxidant precursors: Validation of techniques and Assessment,” American Geophysical Union Fall Meeting, San Francisco , CA , December 8-12, 1997 .
16. “Ozone”, EPA/AWMA International Symposium on Measurements of Toxic and Related Air Pollutants, Research Triangle Park, NC, April 29 – May 1, 1997.
15. “Natural emissions of Oxidant precursors: Validation of techniques and Assessment, (Project NOVA)”, EPA/AWMA International Symposium on Measurements of Toxic and Related Air Pollutants, Research Triangle Park, NC, May 7-10, 1996.
14. “Atmospheric Ammonia: Emission, Deposition and Environmental Impacts”, Department of the Environment, U.K. , Oxford , England , October 2-4, 1995.
13. ” North Carolina Ozone State Implementation Plan – Measurements and Modeling Studies,” EPA/AWMA International Symposium on Measurements of Toxic and Related Air Pollutants, Research Triangle Park, NC, May 14-19, 1995.
12. ” North Carolina Ozone State Implementation Plan – Measurements and Modeling Studies,” EPA/AWMA International Symposium on Measurements of Toxic and Related Air Pollutants, Durham, NC, May 2-6, 1994.
11. “Regional Photochemical Measurements and Modeling Studies – Photochemical Reaction Products,” Air and Waste Management Association International Specialty Conference, San Diego, CA, November 7-12, 1993.
10. “Oxidants in the Atmosphere,” EPA/AWMA International Symposium on Measurements of Toxic and Related Air Pollutants, Durham, NC, May 3-7, 1993.
9. “Tropospheric Oxidant Formation and Chemistry”, American Geophysical Union Western Pacific Meeting, Hong Kong, August 17-21, 1992.
8. “Southern Oxidant Study – Photochemical Observations in the Rural Atmosphere” American Chemical Society National Meeting, Atlanta, GA, April 15-19, 1991.
7. “Atmospheric Dispersion. Computer Models for Risk Analysis”, Chairman, Indo-US Workshop on Environmental Risk Analysis, New Delhi, India, December 12-16, l989.
6. “Global Climate Change”, Chairman, American Institute of Chemical Engineers Annual Meeting, San Francisco , California , November 5-10, 1989.
5. “Global Climate Change”, Chairman, Feature Mini Symposium at American Institute of Chemical Engineers Annual Meeting, Washington, D.C., November 25 – December 2, 1988.
4. “Environmental Impact of Natural Emissions”, Technical Program Chairman, International Specialty Conference, Air Pollution Control Association, Research Triangle Park , NC , March 7-9, 1984.
3. “Natural Emissions of Hydrocarbons, Halocarbons, Sulfur, and Nitrogen Gases into the Atmosphere”, 75th Air Pollution Control Association Annual Meeting, New Orleans , June 20-25, 1982.
2. “Natural Emissions of Hydrocarbons, Halocarbons, Sulfur, and Nitrogen Gases into the Atmosphere”, 74th Air Pollution Control Association Annual Meeting, Philadelphia , June 21-26, 1981.
1. “Biogenic Emission of Sulfur, Hydrocarbon, and Nitrogen Gases into the Atmosphere”, 73rd Air Pollution Control Association Annual Meeting, Montreal , Canada , June 22-27, 1980.