I'm very dubious. If, for instance, DDT didn't cause the thin eggshells  that 
caused so many problems for birds of prey, than it's a strange coincidence  
that they disappeared just when it was phased out in this part of the the 
world.  If the stuff's going to be allowed to gain acceptance again, we should 
demand  definite answers first, not just ifs, buts and maybes.
 
    Regards,
 
    Robert Brenchley

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