Question

ozone hole and ozone layer depletion​

Answer 1

Ozone depletion consists of two related events observed since the late 1970s: a steady lowering of about four percent in the total amount of ozone in Earth's atmosphere, and a much larger springtime decrease in stratospheric ozone around Earth's polar regions. The latter phenomenon is referred to as the ozone hole.

Answer 2

ozone depleted by cfc and are other harmful components in it..... it kills around 1 lakh oxygen molecules by a single molecule....