Ozone layer is formed of ozone. It is a gas.
Ozone layer is formed of ozone molecules. It is a triatomic gas.
See "How was the ozone layer formed?"
The upper layer of the atmosphere is formed by ozone layer. This is a layer of ozone gas.
Ozone layer is formed all over the earth. It is there in stratospheric layer.
See "How was the ozone layer formed?"
The ozone is found and formed in the atmosphere. It is formed in the stratosphere.
UV rays formed the ozone layer. They also destroyed the ozone.
Ozone is formed in stratosphere. It is mainly because of UV rays.
Ozone layer is formed at a certain height. It is because of the factors that are responsible for its creation.
The ozone layer is created in stratosphere. It is formed by the UV rays.
Ozone layer is caused by natural processes. It is formed by UV.
Ozone is in upper. It is because it is formed there.
The ozone layer is formed by UV rays. It is also formed by thunder.