ST. LOUIS, USA – May 30, 2026 – Dr. John Ahn, PhD, MBA, Chief Scientist and Chair of the ALLATRA Global Research Center, took the TEDxStLouis stage to deliver his talk, “Too Small to See, Too Dangerous to Ignore: Micro- and Nanoplastics.” Speaking before a diverse audience at the Missouri History Museum, Dr. Ahn joined a distinguished group of speakers in presenting ideas aimed at addressing some of society’s most pressing challenges.