Ozone-depleting chemicals are most efficient at the poles,both for Arctic and Antarctic regions.The major reason for this is ___________.

Question

Quizplus · Accepted Answer

The presence of ice crystals and solar UV radiation cause chemical reactions that break down ozone-depleting chemicals into substances that attack ozone molecules. This creates a "hole" in the ozone layer over the poles, which is most severe in the Antarctic because of the extreme cold temperatures. The use of ozone-depleting chemicals is restricted by the Montreal Protocol and ozone is gradually recovering, but it is still important to protect the ozone layer by reducing emissions of these chemicals. The other options including A, B, D, and E are irrelevant or false statements in this context.

Ozone-Depleting Chemicals Are Most Efficient at the Poles,both for Arctic