They found hematopoietic stem cells (HSCs) in human lung tissue that make red blood cells, as well as megakaryocytes, which produce the platelets that form blood clots. The findings appear Feb. 27 in ...

For comparison, DuBay notes, a 2022 study of 13 human lung samples identified 39 microplastic particles in the samples, representing 12 different types of polymer. "While we find significantly ...