and found organic fluorine, an indicator of PFAS, in more than half of the samples. High levels of fluorine were most commonly identified in waterproof mascara (82% of brands tested), foundations (63%), and liquid lipstick (62%). Since PFAS compounds are highly mobile, they are readily absorbed through human skin and through tear ducts, and such products on lips are often unwittingly ingested. Manufacturers often fail to label their products as containing PFAS, which makes it difficult for cosmetics consumers to avoid products containing PFAS. Control and removal in the environment Current studies aimed at minimizing POPs in the environment are investigating their behavior in photocatalytic oxidation reactions. POPs that are found in humans and in aquatic environments the most are the main subjects of these experiments. Aromatic and aliphatic degradation products have been identified in these reactions. Photochemical degradation is negligible compared to photocatalytic degradation. A method of removal of POPs from marine environments that has been explored is adsorption. It occurs when an absorbable solute comes into contact with a solid with a porous surface structure. This technique was investigated by Mohamed Nageeb Rashed of Aswan University, Egypt. Current efforts are more focused on banning the use and production of POPs worldwide rather than removal of POPs. See also Air pollution Aarhus Protocol on Persistent Organic Pollutants Center for International Environmental Law (CIEL) International POPs Elimination Network (IPEN) Silent Spring Environmental Persistent Pharmaceutical Pollutant (EPPP) Polychlorinated biphenyl (PCB) Persistent, bioaccumulative and toxic substances (PBT) Tetraethyllead Triclocarban Triclosan References External links World Health Organization Persistent Organic Pollutants: Impact on Child Health Pops.int, Stockholm Convention on Persistent Organic Pollutants Resources on Persistent Organic Pollutants (POPs) Monarpop.at, POP monitoring in the Alpine region (Europe) Biodegradable waste management Ecotoxicology Environmental effects of pesticides Persistent organic pollutants Pollutants Pollution