why are people more concerned about microplastics than regular plastic, doesn’t regular plastic also break down into smaller and smaller pieces?

Question

Like when people are worried about the microplastics in toothpaste, but not the plastic tube it comes in. Isn’t that tube going to break down into way more microplastics than the toothpaste itself contains?

In: Other

Answer 1

Funnily enough, some “Biodegradable plastics” don’t break down in nature, they just deteriorate and turn into microplastics faster than regular plastic.