The ozone has been taken seriously. The Montreal Protocol with 180 countries have been formed.
The Chlorine in the CFC is the element that causes ozone depletion
the ozone depletion has been evident at the poles. Antarctica has the largest ozone hole.
This has been confirmed by the people performing experiments. CFC's cause depletion.
CFC's are responsible for depletion of ozone. They react with ozone to deplete it.
Ozone depletion in ongoing, and has been since the 1700s. Some processes require visible light (so "daytime"), some do not ("anytime").
Ozone depletion is caused by the Ozone Depleting Substances(ODS) which are man-made chemicals and stay in the stratosphere causing the rate of depletion of ozone greater than its rate of formation.
It is because ozone depletion takes place in cold regions. Antarctica is the one place where ozone hole has been noticed.
Ozone depletion causes UV to enter the earth. To stop it, CFC's have been banned.
CFC's is one cause. It has been banned to curb ozone depletion.
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The government is taking measures for ozone layer. For it, CFC's have been banned.
Ozone depletion was first noticed in 1985, the same set of measurements that established the ozone hole. There is evidence that ozone has been more-or-less steadily increasingly depleted, worldwide, since the early 1700s.