Howard Sidebottom(i) and James Franklin(ii)
(i, Department of Chemistry, University College Dublin, Belfield, Dublin
4, Ireland; ii, Alternative Fluorocarbon Environmental Acceptability
Study (AFEAS), The West Tower - Suite 400, 1333 H Street NW, Washington
DC, USA)
A very considerable body of data pertaining
to the atmospheric behaviour of hydrochlorofluorocarbons (HCFCs) and
chlorinated solvents is now available and leads to the following conclusions:
(a) these compounds, with the exception of 1,1,1-trichloroethane, make
a small or insignificant contribution to stratospheric ozone depletion,
global warming, "photo-chemical smog", "acid rain",
or chloride and fluoride levels in precipitation; (b) it seems highly
unlikely that the chlorinated solvents degrade in the atmosphere to
give chloroacetic acids as major products, as has often been claimed
in the literature.
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