Why is damage to the ozone layer a cause for concern? What steps are being taken to limit this damage?

The ozone layer is a protective cover for the earth. It prevents harmful UV rays from entering the earth as these rays are harmful and can result in skin cancer. But, air pollutants like chlorofluorocarbons (CFCs) are the main reason for the depletion of the ozone layer. Too much of UV rays are harmful to plants as they affect photosynthesis and destroy planktons and decomposers. These are the reasons why the damage to the ozone layer is a cause of concern.

As a step to limit this, many developing and developed countries have signed and are obeying the directions of UNEP (United Nations Environment Programme) to freeze or limit the production and usage of CFCs.