CFC alternatives under a cloud
Article Abstract:
The international scientific community has agreed to boost the restrictions on the use of chlorofluorocarbons (CFC) to reduce the depletion of ozone in the stratosphere. However, a byproduct of the three compounds being supported as replacements for CFCs, trifluoroacetic acid (TFA), accumulates in tissue especially of wetland plants and its potential for toxicity at high concentrations is unknown. TFA is produced by interactions of HCFC-123, HFC 134a and HCFC-124 and its concentrations are strengthened by a variety of local factors such as source emitter densities in urban areas and water bodies with high evaporation rates.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1995
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Global environmental engineering
Article Abstract:
World-wide environmental engineering merits scrutiny as a means of slowing or reversing the break-down of stratospheric ozone due to chlorofluorocarbon pollution. Proposals for large-scale engineering have so far received scant attention, but new data showing that ozone depletion is getting worse should prompt examination of ideas such as using alkanes to retard depletion. Ideas should be published in peer-reviewed journals for evaluation by international groups of scientists as the best means of achieving a useful debate.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1992
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Satellite confirmation of the dominance of chlorofluorocarbons in the global stratospheric chlorine budget
Article Abstract:
The release of chlorofluorocarbons increases the chlorine concentration in the stratosphere and causes ozone depletion. A Halogen Occultation Experiment reveals that tropospheric total organic fluorine and chlorine are increasing at the rate of 116 plus or minus 16 parts per 10 to the 12th power by volume (p.p.t.v) and 88 plus or minus 8, during 1985-92. The NCAR two-dimensional chemistry transport model is discussed.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1996
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