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where gas densities are many orders of magnitude lower, so that the time between collisions is far, far longer.) The primary mechanism for producing heat is three body collisions with the third body carrying off the excess energy. (This was mentioned in the previous version, but I have given it priority.) --
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From this it seems that UV creates O3 (step one) and also destroys it (step 2). So why is the depletion of the ozone layer a problem - surely the UV will just create more O3 if there isn't any? I'm sure there is a subtlety here, but it is not coming through (or not clearly) in the article - probably
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the fact that halogens are heavier than air doesn't actually matter. Second, when the catalysts return to the troposphere, they are generally converted to HCl which "rains out", rather than oxidizing other compounds. (The overall intention of the remark was ok, but the parenthetical details were not
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The previous version of this page incorrectly stated that the heat produced when O and O2 combine usually has the form of infrared radiation. This is actually extremely rare under atmospheric conditions, because IR transition probabilities are so very low. (It does happen in interstellar chemistry
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The ozone depletion page has explained how Cl and Br have catalysed the breakdown of ozone. However, how does OH and NO break down ozone? I feel that a short section could be added on this ( or at least somewhere in wikipedia). Thank You.
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the relative rates of the two reactions? I would be good if the explanation could be clarified - probably in the bottom part of the article (also there seem to be paragraphs numbered incorrectly).
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I have corrected a remark about halogens as ozone-depletion catalysts that was slightly misleading. First, as noted in
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