Huahong Shi got his PhD degree from Jinan University, China in 2003. Now he is a full-time professor of environmental sciences at East China Normal University. He is an associate editor of Environmental Science & Technology and Environmental Science & Technology Letters. In the past 10 years, he has been focusing on microplastic and nanoplastic pollution, including analytical methods, fate, toxicological effects, and risks to human health. He has published more than 100 peer-reviewed papers on microplastic and nanoplastic research. He was recognized as the Highly Cited Researchers (HCRs) during 2020–23. Chengjun Sun received her PhD degree from University of California at Santa Barbara, United States, in 2001. She is currently a senior research scientist at the First Institute of Oceanography, Ministry of Natural Resources, China. She serves as an associate editor for Marine Pollution Bulletin and an editorial board member for Journal of Marine Science and Engineering. Dr. Sun and her group have worked on microplastic pollution investigation in coastal waters, open oceans, and the polar regions with a focus on microplastic sampling and identification methods in the seawater, sediment, biota, and air, with the goal of understanding the microplastic pollution level in the world’s oceans and assessing their potential impact. She has published more than 100 peer-reviewed papers, including over 30 papers on microplastics.