Despite living in the tropics, I avoid the use of sunscreen. The chemicals in it don’t like me. It’s now apparent, marine life doesn’t like those chemicals either:
The ingredients of sunscreens and sunblocks can react with UV light to create hydrogen peroxide which is toxic to phytoplankton. It didn’t say anything about bleaching hair. From the ACS Weekly PressPac:
Antonio Tovar-Sanchez and David Sánchez-Quiles report in the Journal of Environmental Science & Technology that common ingredients in sun blocks and sun screens, TiO2 and ZnO2 nanoparticles, can react with UV light in seawater to produce hydrogen peroxide that is toxic to phytoplankton. The sunblocks are slathered on and then washed off when the sunbather hits the water.
To investigate the matter, they hit the beach. They went to Majorca Island’s Palmira beach on the Mediterranean along with about 10,000 beachgoers, a small portion of the more than 200 million tourists that flock to Mediterranean shores every year. Based on lab tests, seawater sampling and tourism data, the researchers concluded that titanium dioxide from sunblock was largely responsible for a dramatic summertime spike in hydrogen peroxide levels in coastal waters — with potentially dangerous consequences for aquatic life.
Via Climate Depot.