Ozone is produced in the upper atmosphere when ultraviolet radiation from the sun is absorbed by oxygen molecules. Oxygen molecules are good at absorbing UV radiation but the energy is just the right wavelength to break the bond between the two oxygen atoms resulting in 2 free radical oxygen atoms. These oxygen radicals then react with normal oxygen atoms to produce ozone. (They may also recombine to re-form oxygen or react with existing ozone molecules to re-form normal oxygen.) Ozone is even better than normal oxygen at absorbing UV radiation and thus helps shield us from excessive UV radiation. When it does, it breaks down to form a normal oxygen atom and a new oxygen radical - which can then later react to re-form some new ozone.
Halogenated gases - hydrocarbons with one or more hydrogens replaced by halogens like chlorine and especially those with fluorine are very stable in the lower atmosphere. They have been popular as solvents, degreasers, and refrigerants because they are non-flammable and very stable. Because they are so stable, they tend to stay in the atmosphere for a long time once they evaporate. Eventually they diffuse up into the high atmosphere where the energy of the sunlight is much more intense - intense enough to start breaking them down and forming radicals from the halogen atoms.
These halogen atoms compete with the reactions that produce ozone to accelerate the breakdown of ozone and soak up oxygen radicals that would otherwise form ozone.
As an example - if the halogen is chlorine:
O2 + hv " border="0">O + O (1)O+O2" border="0">O3 (2)O+O" border="0">O2 (3)O+O3 " border="0">2O2 (4)O3 + hv " border="0">O2 + O (5)Cl+O3" border="0">O2+ClO (6)ClO+O" border="0">Cl+O2 (7)Reaction 6 breaks down ozone like reactions 4 and 5, but unlike 5, it doesn't yield a new oxygen radical to be used to make more ozone - instead, it produces ClO which then (by way of reaction 7) competes with reaction 2 to soak up the available oxygen radicals that could form new ozone. Note that when reaction 7 occurs, it produces a new chlorine radical to promote reaction 6. Eventually the chlorine radicals may combine with something else to produce a more stable molecule - perhaps HCl - but in the meantime they can go through a lot of cycles of inhibiting ozone formation and promoting ozone destruction.
See "What is causing the depletion of the ozone layer?" in the "Related questions" section below.
Gases and pollution can really just destroy it that's why we are trying to stop pollution because our ozone is slowly destroying.
CFC's are destroying the ozone layer. They react with ozone to destroy it.
Ozone depleting Substances. They are the ones destructing ozone.
Refrigerants can destroy ozone. CFC is the main among them.
chlorofluorocarbons
pollution
No, they are not. CFC's destroy the ozone layer.
Popping bubble wrap does not destroy ozone.
The ozone depleting substances are interfering with ozone. They destroy the ozone.
Popping bubble wrap does not destroy ozone.
CFC's are man made chemicals. They destroy the ozone layer.
CFCs (chlorofluorocarbons) destroy ozone in the ozone layer.
Yes, CFCs can destroy the ozone layer. They react with ozone present in ozone layer and decompose it.
Yes.CFC's destroy the ozone layer.
You don't destroy ozone layer. It is vital for life on earth.
No, it does not destroy. The ozone layer is present in stratosphere. No meteor shower can destroy it.
The chemicals that destroy the ozone layer are CFC's. These CFC's are cholorofluorocarbons which react with ozone to destroy it.
CFC's destroy ozone. They react with ozone and deplete it.
HCFC do not destroy ozone. They are an alternative to CFC's.
The ozone layer can be destroyed by CFC's. They react with ozone.
No, they are not. CFC's destroy the ozone layer.
The gases that destroy ozone are CFC's. They react with ozone to deplete it.
We have affected ozone layer by CFC's. These are man made chemicals that destroy ozone.