"Microbeads" are generally from 10 micrometers to 1 millimeter in diameter. [0] Ultrafine particles are less than 100 nanometers in diameter. [1] So while there

"Microbeads" are generally from 10 micrometers to 1 millimeter in diameter. [0] Ultrafine particles are less than 100 nanometers in diameter. [1] So while there could be environmental effects from ultrafine particles, the analogy to microbeads isn't necessarily correct. [0] https://en.wikipedia.org/wiki/Microbead https://en.wikipedia.org/wiki/Microbead [1] https://en.wikipedia.org/wiki/Ultrafine_particle https://en.wikipedia.org/wiki/Ultrafine_particle