Alternative Fluorocarbons Environmental Acceptability Study

Project Description
The benefits of refrigeration, air conditioning, and energy
efficient insulation can be provided conveniently and
effectively by hydrochlorofluorocarbons (HCFCs) and
hydrofluorocarbons (HFCs). These retain many of the
properties of CFCs that are desired by users. However,
the presence of hydrogen in their structures means
that, unlike CFCs, the alternatives are largely removed
in the lower atmosphere by natural processes. The
environmentally important properties of HCFCs and HFCs
were reviewed by the Alternative Fluorocarbons
Environmental Acceptability Study (AFEAS) in
1989. Leading experts from around the world evaluated
the available scientific information. The experts
concluded that the ozone depletion potentials (ODPs)
and global warming potentials (GWPs) of HCFCs and HFCs
are much smaller than those for the CFCs, and they
should not contribute to tropospheric ozone or acid

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