I have a question about the seas and ocean we swim in. How does the Ocean get rid off all the natural pollutants (for example dead animal debris) and man-made pollutants (human waste, garbage, etc)? I know that there's salt in the water, which helps to kill bacteria, but does salt really do that much? And also, I heard that the Ocean is so big, that pollutants are naturally diluted through the waters, making it safe. Is this true?
Oh, and I don't mean those giant plastic garbage deposits out in the middle of the ocean, I'm talking about our beaches and seas.
I'm asking this because I never see any brownish murky water whenever I go swimming. Any feedback would be highly appreciated. Thanks!