Thailand has announced that, across its marine national parks, it's banning sunscreens that contain chemicals known to damage coral.

The Thai Department of Conservation said four ingredients commonly found in sunscreens are shown to destroy chemical larvae. They obstruct coral reproduction and contribute to bleaching of reef systems.

Those banned chemicals are: oxybenzone, octinoxate, 4-methylbenzylidene camphor or butylparaben.

Hawaii and the Pacific islands of Palau, Bonaire, and Aruba, which are all known for their delicate reef systems, have also announced similar bans.

To learn more about reef safe sunscreen—which typically include UV-blocking minerals like oxide and titanium dioxide as their active ingredients—check out this handy guide.

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