The tiny pieces of mostly invisible plastic have already been found almost everywhere else on Earth, from the deepest oceans to the highest mountains as well as in the air, soil and food chain
This photo taken on October 14, 2021 shows microplastics in sediment samples collected by a "Smith-McIntyre" grab machine in the sea, at Japanese marine-station network Jambio's laboratory in Shimoda, Shizuoka prefecture. Image: Charly TRIBALLEAU / AFP