Ozone layer issue

HOLE

Think of the environmental term describing a thinning area in Earth’s protective atmospheric shield, often linked to harmful UV radiation.

The clue "Ozone layer issue" points to "HOLE" because the ozone layer has a well-known problem: a thinning or gap often called the "ozone hole." The word "issue" hints at a problem, and in this case, it’s a literal hole in the Earth’s protective ozone layer. It’s a straightforward definition with no wordplay—just a direct reference to a major environmental concern.