Two-thirds of people surveyed by toilet paper purveyors Proctor & Gamble admit to peeing in the ocean and almost half said they had done it more than once. However this doesn't count as ocean pollution because of what urine actually is: 95 percent water and some sodium and chloride ions, aka table salt. Both things that the ocean already has in spades. The one thing pee has that the ocean doesn't is urea. It's a carbon-based compound that helps the body rid itself of nitrogen. But according to ocean scientists, the nitrogen in urea combines with ocean water to produce ammonium, a compound that actually acts as food for ocean plant life.