We must protect the "OZONE LAYER"

The ozone layer is keeping and protect 
human, animal,trees and all living.It can be control the harmful  ultraviolet rays.
but now the ozone layer is very pollution.
The scientists found in the 1970 discover that certain .Man made chemicals could 
destroy ozone and deplete the  ozone layer.Further research found that the growing production and use of chemical like.