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| MunYee |
 Posted: Mon Apr 21, 2008 7:15 am Post subject: Depletion of ozone layer |
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Forum Freshman
Joined: 18 Apr 2008
Posts: 3
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| What is main cause of the depletion of the ozone layer? Is there any solution? |
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| BumFluff |
| Posted: Mon Apr 21, 2008 8:57 am Post subject: |
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Forum Senior
Joined: 06 Mar 2008
Posts: 393
Location: Canada
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The main cause I believe is the Earth's volcanic activity. The CFCs us humans create are a mere percentile of what that is but it, in my opinion, still attributes to the ozones depletion. There are theoretically ways to fix it but these ways could prove disasterous by side effects.
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"The trouble with the world is that the stupid are cocksure and the intelligent are full of doubt" - Bertrand Russell |
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| marnixR |
| Posted: Mon Apr 21, 2008 9:24 am Post subject: |
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Forum Isotope
Joined: 10 Apr 2007
Posts: 2584
Location: Cardiff, Wales
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CFCs are a major contributing factor because in the lower atmosphere they're non-reactive and so don't wash out over time (or at least very slowly)
once they drift to the upper atmosphere UV light breaks down the CFCs and creates free Cl which then reacts with O3 to form O2 and ClO
the latter then splits up under the influence of UV light, the free O recombines to form O2 and the free Cl is ready to destroy more O3 molecules
that's why CFCs do damage to the ozone layer beyond what you would expect from their relatively low concentrations : mostly unreactive at lower latitudes and highly reactive + repeatedly so at higher altitudes
don't know how volcanoes are supposed to contribute, unless there are volcanoes that spew out substantial amounts of Cl and inject these as far as the stratosphere
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