A derivative approach based on claims that tests showed sunscreen ingredients applied to corals are potentially harmful? Someone thought sunscreen washing off into seawater rated scrutiny for environmental issues.
Yes, relatively small quantities of sunscreen can bleach acres of coral... but scientists continue to blame it on global warming more than a decade after that link was discovered. Ironically, much of the bleaching and decline and death of remote coral reefs was probably caused by the very same scientists studying the reefs.