So we know that microplastics are everywhere. The thing that doesn't really seem clear yet is whether microplastics are actually harmful. Polyethylene, for exam

So we know that microplastics are everywhere. The thing that doesn't really seem clear yet is whether microplastics are actually harmful. Polyethylene, for example, seems quite harmless. (There are also generally harmless substances that become harmful in the right shape, e.g. quartz as fine dust or fibers)