For the first time since the late 1990s, the U.S. Food and Drug Administration has added another chemical - bemotrizinol, or BEMT - to its list of approved active ingredients in over-the-counter sunscreens. During heat waves, such as the ones blanketing Europe and the U.S., sunburns are especially dangerous because they impair sweating, increasing risks of heat exhaustion and heatstroke, the U.S. National Weather Service warns.
Here is what you need to know about sunscreens in general and BEMT in particular:
