". . . as little is known about its effects"
"However, long term impacts on marine
organisms are currently unknown."
"However, this is of more importance for larger plastic debris"
levels, microplastics are unlikely to be an important global geochemical reservoir for POPs"
Maybe it's worth worrying about microplastics, when we actually know that there's anything to worry about?
By which I do not mean to say that there is nothing at all to worry about. Of course, we should do more to keep garbage out of the ocean, particularly non-bio-degradable plastics, and I think probably everyone would agree about that. The main cuprit in putting garbage into the Pacific are third world countries which can't afford and/or don't bother to dispose of plastics properly.
An international effort to reduce the amount of plastic dumped into the oceans would probably not cost a ridiculous amount of money
But to say that the ocean is "broken" seems quite hyperbolic. The concentration of plastic in the Great Pacific Garbage Patch is something like 5.5kg per square kilometer (http://en.wikipedia.org/wiki/Great_P..._Garbage_Patch
). Exaggerating these problems merely discredits the very worthwhile effort to solve them.