The sources analyze global contamination by PFAS, persistent chemicals that accumulate in the environment and pose a threat to human health and ecosystems. It is argued that the persistence of PFAS exceeds a new planetary limit, due to its levels in rainwater, soils and surface waters that exceed safety guidelines. Health impacts, such as immune suppression, are detailed and mitigation strategies are proposed, including restricting their use and developing safer alternatives. Finally, a timeline of key events related to the understanding and regulation of PFAS is presented.

Cousins, I. T., Johansson, J. H., Salter, M. E., Sha, B., & Scheringer, M. (2022). Fuera del Espacio Operativo Seguro de un Nuevo Límite Planetario para Sustancias Per- y Polifluoroalquiladas (PFAS). Environmental Science & Technology, 56(15), 11172–11179. https://doi.org/10.1021/acs.est.2c02765