See "What is the ozone layer?"
Ozone layer is not made by itself. It is made by an existing element oxygen. Ozone layer is formed by large number of these oxygen being converted to ozone.
oxygen
The ozone forms a protective layer. It is present as ozone layer.
The stratospheric ozone layer forms at high altitude. It is 25 km.
Ozone gas forms a strong layer. It is present as the ozone layer.
Stratospheric ozone forms the ozone layer. Destroying it is ozone depletion.
When the ozone layer is formed, the life forms evolved. They were not possible earlier.
No,it is not. It is the helpful one as it forms the ozone.
The ozone layer forms a blanket in the stratosphere. It protects us from UV rays of the sun.
It is a good thing for the ozone to be in the upper atmosphere. It is due to the fact that ozone in upper atmosphere forms the ozone layer.
Ozone layer forms in summer. therefore it initiates its recovery at that time.
The ozone layer forms in the stratosphere by UV rays. The stratosphere is the ideal location for its formation.
Forests help a great deal in recovering the ozone. It is because they produce oxygen which forms ozone.
Layer that contains ozone