I have read that Chlorofluorocarbons (CFCs) are detrimental to the Ozone layer. How exactly? Wasn't Mount Erebus shooting thousands of tons of chlorine per day into the upper atmosphere and over to Anatartica in the 70s with no effect to the ozone layer?

How was it proven that CFCs destroy Ozone?

  • 2
    BTW questions like these are better suited for Earth Science, but not in this form.
    – user2451
    Aug 24 '16 at 9:25
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    Or Skeptics SE, but also not in this form
    – THelper
    Aug 24 '16 at 10:53
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    Please do not change questions once they've been answered. If you want to ask a follow-up question, do so as a separate question. And please do not cross-post questions on different sites at the same time.
    – 410 gone
    Aug 25 '16 at 5:26

Yes - CFCs interact with and break down ozone.

It's basic chemistry:

interaction of CFCs and UV radiation, breaking down O3 into O2

CFCs are lifted by buoyancy into the stratosphere, where they are broken up by the sun's ultraviolet radiation (1), and the chlorine then reacts with ozone (2), with equation:

Cl + O3 → ClO + O2 (3)

Then that chlorine monoxide reacts with atmospheric oxygen: (4)

ClO + O → Cl + O2

and so the chlorine can go on to damage more ozone, again and again. (5)

source: UCAR


I'm just going to answer my own question, since everyone else failed.

You can easily google the specifics- at peak, the world produced 400m tons of ozone daily, against 3kt of cfc.

1 mol of cfc destroys less than a thousand mols of ozone.

This means 3mt of ozone destroyed, or 1%, due to human cfc emissions.

As you can see cfc cannot have a meaningful effect on the ozone layer.

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    Your link doesn't support the claims you make of it. Please do not misrepresent other people's hard work to justify pseudo-science.
    – 410 gone
    Aug 25 '16 at 5:33
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    Yes it does. Just answer the question.
    – D J Sims
    Aug 25 '16 at 6:06
  • Be sure to accept is as the answer.
    – acpilot
    Aug 27 '16 at 20:29

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