I guess in that case were talking about "pollution absolutes". And in absolute terms anything short of pristine is polluted.
In the physical realm, "pollution" can often be a matter of concentration, and perfection doesn't really exist. Enjoy that glass of dinosaur pee you're drinking. ;'}
In the moral realm the standard (God) is perfection, of which we all fall short. But we're still called cooperate with God's Grace to grow in holiness. Deliberately, knowingly wallowing in moral filth does not help us grow in holiness.