Our water ways can be protected: no pipelines and no tankers.
So, raw sewage is a net benefit,is it?... Or maybe you're an ideologue that turns a blind eye to the cause when it affects you?

Nice plume of raw sewage, eh?
Apparently the tidal action of the ocean takes care of that crap! (Mind you I'm not sure what prevents it from floating to the top)
It's called bio-remediation, and yes, it works on oil as well