Ozone is an allotrope of oxygen which is found mainly in the stratospheric region. Some small concentrations of ozone are also present in the tropospheric region but the concentrations are of the level of parts per million so the concentrations are mainly neglected.
The thinning of ozone layer is the depletion of certain amount of molecules of ozone in the ozone layer. This is a harmful phenomenon.
See "What is the condition of the ozone layer now?"See "How large is the ozone hole now?"See "What is the condition of the ozone layer?"
Troposphere
Ozone layer was depleting earlier. Now it is being aided.
do not now
The ozone layer is recovering. It is because of Montreal Protocol's ban on CFC's.
Ozone layer is a pool of ozone molecules presnt in the atmosphere. Earth is till now the only known planet to have the ozone layer.
Ozone is a gas produced by the sun's reaction with oxygen. Ozone alerts in cities come from a warm sunny day. Ozone is a natural occurring gas. A great example of how this is a natural process is the "hole" in the zone layer. This occurs when then sun can not hit the ozone layer and ozone startes to decay into oxygen. That is why we only see these "holes" near the poles and only during their winter months. The ozone layer is not connected to global warming. If the atmosphere beneath the ozone layer warms, the thermocline between the troposphere and the ozone layer weakens. This then allows more water vapor to enter the ozone layer, and reduce the amount of ozone found there at any given time.
Ozone used to be without hole earlier. It has developed a hole now.
The hole in the ozone layer was a big one when CFC's were discovered. However it has shrunk very small now.
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Ozone layer contains ozone in it. Therefore, it is named so.