The four ingredients here (avobenzone, oxybenzone, ecamsule and octocrylene) seem to be specific to chemical* sunscreens, as opposed the sunscreens that are "physical" like Titanium dioxide/zinc oxide based ones.<p>They're like the ones in the Hawaii ban on some otc sunscreens (on oxybenzone and octinoxate) because those two chemicals appear to be particularly bad for coral reefs or something.<p>Then again, there is ofc the issue of nanoscale particles on your face passing through your own skin, but that sounds like it applies for a lot of modern makeup anyways. And for that, I take it cosmetics R&D people already have something on this...(?)<p>(*Chemical/physical sunscreens are categorized by their uv protection mechanisms: the former type generally uses organic compounds to absorb uv, the latter type uses inorganic compounds to generally just reflect/scatter, to loosely put it)