Ozone is a tri oxygen molecule. It is formed by the action of UV light on oxygen.
The ozone hole is a natural, repeating occurence. See "How did the ozone hole occur?"We may or may not make it "deeper", start sooner, get larger, last longer, but we do not have any part in making the hole. Nature does that on her own, when it is later winter / early spring at a pole.
Occurances
occurence should be OCCURANCE NO- occurence should be OCCURRENCE
The ozone layer is not fixed. Ozone holes are a natural occurence, but the size of them and the amount of ozone between us and the Sun is still showing no improvement. Here is what we can do: # eliminate high altitude aircraft. Their exhaust destroys some ozone, and consumes oxygen form which ozone is made. # reduce rockets into space. Their exhaust destroys some ozone. # subsidize the production / use of CFC replacements in third world countries. The bad stuff is still being made and used there, and this must stop too. # increase the oxygen producing plant life, and reduce the oxygen consuming fossil fuel combustion for propulsion / power. This increases oxygen, and decreases water vapor addition, which will add to the thickness of the ozone between us and UV sources such as our Sun.
An incident is an event or occurence.
the occurrence had me shivering.
the three types of rocks are classifed based on theire mode of formation or occurence where, they are formed but not of the todays occurence.
to reduce the occurence of infection
To prevent the occurence of measles, mumps, and rubella.
random changes of variations in a dna sequence
the chupacabra is a real animal, not a supernatural occurence.
Each occurence means that the liability limit of your policy doesn't have an accured limit. Every time you have an accident, the policy limits are available (i.e. each occurence).