Fionn Ferreira is an internationally recognised scientist, inventor and sustainability advocate whose work is reshaping how the world tackles microplastic pollution. Raised on the coastline of West Cork, Ireland, Fionn developed an early connection to the ocean and a growing concern for the plastic washing ashore. That curiosity turned into action during his teenage years, when he began experimenting with ways to identify and remove microplastics from water using simple materials at home. This hands-on approach laid the foundation for what would become a globally celebrated scientific breakthrough, driven by persistence, creativity, and a clear sense of purpose.
At just 18, Fionn gained international attention after winning the Global Grand Prize at the Google Science Fair 2019 for his magnet-based method of removing microplastics from water. The innovation uses a reusable ferrofluid that binds to microplastic particles, allowing them to be extracted safely and efficiently, including from drinking water. This work positioned Fionn as one of the leading young voices in environmental science and led to recognition including Forbes 30 Under 30, National Geographic Young Explorer, and the European Patent Office Young Inventors Prize. His technology has since progressed from early prototypes to scalable systems designed for real-world application, supported by the Footprint Coalition founded by Robert Downey Jr.
Alongside his research, Fionn is the Founder and CEO of Fionn & Co., as well as the driving force behind the Green Journey Coalition, organisations dedicated to scaling sustainable water solutions and advancing the circular economy. He is currently a Doctoral student at ETH Zürich, continuing advanced research in chemistry while maintaining a strong focus on environmental impact. Fionn has addressed audiences at the World Economic Forum, House of Lords, National Geographic Explorer’s Summit, and major global sustainability conferences, where he translates complex science into clear, motivating ideas that inspire action across business, education, and policy.
Fionn’s ability to communicate extends beyond the stage. He is also a TV presenter and science communicator, hosting the RTÉ children’s series ‘What’s Next? Science’, where he brings innovation, climate solutions, and scientific thinking to younger audiences. Whether speaking to corporate leaders, students, or global institutions, Fionn combines credibility with optimism. His story proves that age is no barrier to impact, and that meaningful change starts when people trust their ideas and commit to seeing them through.
