[ryanmercer]

>Ingested microplastic particles can physically damage organs and leach hazardous chemicals—from the hormone-disrupting bisphenol A (BPA) to pesticides—that can compromise immune function and stymie growth and reproduction. Both microplastics and these chemicals may accumulate up the food chain, potentially impacting whole ecosystems, including the health of soils in which we grow our food. Microplastics in the water we drink and the air we breathe can also hit humans directly.

And a little more concerning

>What matters most is whether these physical and chemical impacts ultimately affect an organism’s growth, reproduction or susceptibility to illness. In a surprising study published in March, not only did fish exposed to microplastics reproduce less but their offspring, who weren’t directly exposed to plastic particles, also had fewer young, suggesting the effects can linger into subsequent generations.

https://www.scientificamerican.com/article/from-fish-to-huma...

[refurb]

So basically nothing like asbestos at all?

[ryanmercer]

Asbestos can take 10-80 years to cause cancer based on a cursory Google search while plastics are capable of causing a decline in fertility rates for at least two generations as well as begin to immediately interfere with hormone levels/production.

It took decades to understand asbestos was bad as it is and even then it took direct exposure (generally with you working with the stuff). Plastic is building up in the environment daily, and the levels have only really start to increase.

Plastic is also effectively forever, there is no practical plastic abatement like there is with asbestos. One great way of dealing with asbestos removal is keeping it damp, microplastics though are just going to spread with water. Microplastics are in the air and water, it's effectively falling like snow from the sky which is documented in the NatGeo article I linked.

Concentrations of microplastics is only going to go up as more and more of the plastic we've created starts to break down into smaller and smaller pieces. When you get small enough, like nano-scale, particles can get extremely dangerous as they can cross the cell membrane.

Plastic pollution is likely going to be far worse than asbestos and for incredibly more species.

[refurb]

So basically it could be bad. Right now there is little evidence it's anywhere near the concern that asbestos is, but we don't know for sure.