Select Invited Talks, Speeches, Testimony

  • Commencement Address, University of Georgia Graduate School, Doctoral Ceremony, Athens, GA, May 2024. Transcript >>
  • Commencement Address, University of Georgia Graduate School, Masters/Specialists Ceremony, Athens GA, May 2024. Transcript >>
  • Invited Lecture, Donna S. Hall Engineering Lecture, Vanderbilt University, Nashville, TN, April 2024.
  • Invited Lecture, RASEI 2023 Nozik Lecture, University of Colorado, Boulder, CO, December 2023.
  • Plenary for Science, High Ambition Coalition meeting, Intergovernmental Negotiating Committee (INC-2) for the Global Plastics Treaty, April 2023, Paris, France.
  • Distinguished Visiting Professorship and Lecture, April 2 – 14, 2023, University of Minnesota Morris, MN.
  • Keynote, UN CounterMeasures: “Discovering Plastic Leakage Hotspots,” June 2021
  • Invited Lecture, University of Minnesota Covestro Lecture, April 23, 2021.
  • Keynote, UGA Foundation Fellows Lecture, February 2021.
  • US House of Representatives Testimony to the Subcommittee on Environment and Climate Change, Hearing: Reduce, Reuse, Recycle, Reform: Addressing America’s Plastic Waste Crisis, March 4, 2020.
  • US House of Representatives Testimony to the Subcommittee on Water, Oceans and Wildlife, Hearing: Plastic’s Impact on Oceans, October 29, 2019.
  • Plenary, Japan, American, German Kavali Frontiers of Science, Nat. Academy of Sciences, Kyoto, Japan, Sept 2019.
  • Keynote, Resource Recycling Annual Conference, New Orleans, LA, August 27, 2019
  • Keynote and Plenary, PEMSEA Ocean Summit, Iloilo, Philippines, Nov. 29, 2018
  • Plenary, National Geographic Explorers Festival, Planet or Plastic Panel, NGS, Washington DC, June 14, 2018
  • Keynote, 2018 CURO Symposium, University of Georgia, April 9, 2018.
  • Plenary, 6th International Marine Debris Conference, NOAA/UNEP, San Diego, CA, March 2018.
  • Plenary, Healthy and productive oceans-sustaining blue growth in the Arctic, Arctic Frontiers, Norway, Jan 2018.
  • Keynote, Volvo Ocean Race Sustainability Summit, Alicante, Spain, October, 2017.
  • Ocean Plastic Debris: Coming together to solve this global problem. Addressing the Vietnam National Assembly, Committee for Science, Technology and Environment, Vietnam, September 2017.
  • Keynote, African Marine Waste Conference, Port Elizabeth, South Africa, July, 2017.
  • Plastic waste into the Ocean – Can we come together to solve this global problem? Addressing Indonesia Coordinating Ministry for Maritime Affairs, Jakarta, Indonesia, June 2017.
  • Plastic waste into the Ocean – Can we come together to solve this global problem? Addressing the Philippines House of Representatives, Manila, Philippines, June 2017.
  • Plenary, Smithsonian Earth Optimism Summit, Story Collider, Washington DC, April, 2017.
  • Seminar and briefing, White House Office of Science Technology and Policy, Washington, DC, Oct. 29, 2016.
  • Plenary, Ellen MacArthur Foundation CE100 Summit, Abbey Road Studios, London, UK, June 22, 2016.
  • United Nations Informal Consultative Process on Oceans and the Law of the Sea Plenary, UN Headquarters, New York City, June 13-17, 2016.
  • Plenary Plastic U-Turn Conference, Copenhagen, Denmark, June 6, 2016.
  • US Senate Testimony to the Senate Environment and Public Works Committee, Marine Debris and Wildlife: Impacts, Sources, and Solutions, May 17, 2016.
  • Keynote, Hold Norge Rent (Keep Norway Beautiful), Oslo, Norway, February 2016.
  • Plenary, Our Ocean Conference (invited by State Depart, hosted by John Kerry), Vina del Mar, Chile, Oct 5, 2015.
  • Plenary Address, G7 Meeting, Berlin, Germany, August 3, 2015.
  • Plenary, Global Ocean Commission and Prince of Wales Sustainability Unit, Hay Adams, Wash., DC, Mar 2015.
  • Keynote, From the Banks of the Snake River to Across the Atlantic, Royal Geographical Society, London, March 2015.
  • Plenary and Briefing, “Plastic Waste Inputs into the Ocean,” AAAS Annual Meeting, San Jose, CA, Feb 12, 2015.