Microplastics found in live human lung tissue
Here's a nice detailed research paper on the problems with microplastics:> "Today, it is an issue of increasing scientific concern because these microparticles due to their small size are easily accessible to a wide range of aquatic organisms and ultimately transferred along food web. The chronic biological effects in marine organisms results due to accumulation of microplastics in their cells and tissues. The potential hazardous effects on humans by alternate ingestion of microparticles can cause alteration in chromosomes which lead to infertility, obesity, and cancer. (2018)"You can get it at sci-hub_se just enter this title in the search box: "Microplastic pollution, a threat to marine ecosystem and human health: a short review"For a broader discussion on the continuing issue of environmental toxins accumulating in human beings, more pop-sci:https://www.nationalgeographic.com/science/article/chemicals...> "Yet even though many health statistics have been improving over the past few decades, a few illnesses are rising mysteriously. From the early 1980s through the late 1990s, autism increased tenfold; from the early 1970s through the mid-1990s, one type of leukemia was up 62 percent, male birth defects doubled, and childhood brain cancer was up 40 percent. Some experts suspect a link to the man-made chemicals that pervade our food, water, and air. There's little firm evidence. But over the years, one chemical after another that was thought to be harmless turned out otherwise once the facts were in."Note however that US academic institutions basically cut all research into these subjects due to political and industrial pressure.  It started with Republican attacks on USGS funding for environmental pollution research in the early 1990s, and continued with NIH cutting funding for environmental carcinogen research in favor of inheritied genetic explanations for cancer. Hence, 'little firm evidence'.