[_DeadFred_]

We aren't really looking. In the most well known case we were able to identify they were killing salmon because the salmon were dieing and worked back from that, not because some study led there first.

https://www.ehn.org/toxic-tire-chemicals-threaten-salmon-as-...

[RobGR]

That is a case of a specific chemical in tires, not microplastics generally, or even rubber tire particles generally.

[kevinob11]

Isn't [bad thing is happening] let's work backwards and find [difficult to find cause] a really solid approach?

[ip26]

Good when the damage is done, bad as a method of approving new chemicals.