The ozone is harmful not at stratosphere. It is harmful at some
layer. Te layer is troposphere.
Ozone layer is not harmful. Absence of ozone layer is harmful.
Very reactive. I don't think ozone layer is harmful.
Ozone layer cannot be harmful. It protects us from harmful UV rays of the sun.
The ozone layer becomes harmful in some cases. This is when it depletes.
The ozone layer is harmful in troposphere. It is because in that layer it acts as a pollutant.
Halogenalkanes are harmful to ozone. They react with ozone and deplete it.
Halons are harmful for ozone. They also react with ozone to deplete it.
Ozone layer protects us from harmful UV rays. these are harmful UV radiations of the sun.
CFC's are harmful. They react with ozone to deplete it.
See "What is causing the depletion of the ozone layer?"
Harmful ultraviolet radiations are absorbed by the ozone layer.
Ozone layer is composed of pool of ozone layer. It protects us from the harmful UV rays.
Ozone layer protects us from harmful radiation. It is their special property.
CFC's are used in refrigerators. They are extremely harmful for ozone layer.
The damage to ozone can be harmful. It is because it could create an ozone hole.