I was only able to read the abstract because I didn’t want to pay to read the paper. It said that 20% of the particles were aluminum silicate from coal burning and the remainder were believed to be from cosmetic products. I would love to see further analysis to confirm or disprove this origin. In order to know if this is a problem or not one needs to know how long these particles last in the natural environment and what, if any, are the harmful effects from them.
