Great, now we'll have plagues of hungry bacteria going through and eating 90% of everything we own.
There really isn't much of a problem with plastic not decomposing. As long as it makes it into a landfill and not a body of water, it's fine to sit there. Consider it carbon sequestration.
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Give me absolute safety, or give me death!
The whole aim of practical politics is to keep the populace alarmed (and hence clamorous to be led to safety) by menacing it with an endless series of hobgoblins, all of them imaginary. -H.L Mencken.