Lesson #564

Ozone layer is on track to fully repair itself by the 2060s

The ozone layer, a part of the stratosphere that deflects the sun's harmful UV rays, was in danger of disappearing due to industrial and consumer chemicals. But a global treaty signed in Montreal reversed the damage. Now, a new report says the ozone layer is on track to fully repair itself by the 2060s. Plus, learn the English expression "thin out."