Day 011 - 12 Jul 94 - Page 44


     
     1        rather than the ODP".  It was just whether there was part
              of a sentence missing there as in, perhaps, it should read
     2        something to say "as a measure of the damage potential of
              chemicals towards the ozone layer".
     3
         MR. JUSTICE BELL:  That is what that was meant to say,
     4        Professor Duxbury?
              A.  Yes.  I mean, the point is that if you state that
     5        something has an ozone depleting potential, it is actually
              on the basis of a particular way of modelling the
     6        processes of formation and destruction of things in the
              atmosphere.
     7
              Chlorine loading is primarily a way of saying that there
     8        is a certain percentage of chlorine which has got to a
              certain level of the atmosphere, and to that extent it
     9        does not depend upon your assumptions about what or what
              has not happened in terms of putting the chlorine there.
    10
         MR. JUSTICE BELL:  Yes, I think the point is one on your
    11        grammar really.
 
    12   MISS STEEL:  Yes, I am not trying to pick holes but I just want
              to make things clearer.
    13
         MR. JUSTICE BELL:  The last thing that SORG is doing is
    14        advocating the use of chlorine loading of the tropisphere?
              A.  No, it certainly is not.
    15
         Q.   It is just as a measure.
    16        A.  No, it certainly is not.
 
    17   MISS STEEL:  Right.  The only other one is on page 10 where it
              says:  "These are formed by the reaction of chlorine atoms
    18        with methane of nitrogen dioxide, should that be "or"?
              A.  Yes, it should be "or" -- that is my inability to use
    19        a word processor, I think you could say.
 
    20   MR. JUSTICE BELL:  Yes, thank you.
 
    21   MISS STEEL:  OK.
 
    22   MR. JUSTICE BELL:  What I have said holds for witnesses in the
              future.
    23
         MISS STEEL:  Right.
    24
         MR. JUSTICE BELL:  If you have any doubt about it in relation
    25        to any witness in the future, then ask.
  
    26   MISS STEEL:  OK. 
              A.  Basically, hydrogen chloride comes from methane and 
    27        chlorine nitrate from nitrogen dioxide.
 
    28   MISS STEEL:  Right.  I am sorry, I might go a bit slowly
              because we have so many notes.  Is it right that the term
    29        "CFC" is a naming system for chlorofluorocarbons, and
              that originally it was an abbreviation for convenience
    30        rather than being a true chemical description?
              A.  It is a name, I think, for convenience but, in fact,

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