Pollutants known as “contaminants of emerging concern” or chemicals that could potentially harm human health and have been found in the environment, including pesticides, ingredients from personal care products, pharmaceuticals and perfluoroalkyl substances (PFAS), are increasingly found in streams and lakes. Pollutants known as “contaminants of emerging concern” or chemicals that could potentially harm human health and have been found in the environment, including pesticides, ingredients from personal care products, pharmaceuticals and perfluoroalkyl substances (PFAS), are increasingly found in streams and lakes. Environment Phys.org – latest science and technology news stories