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| q |
Since 1995,
the atmospheric concentrations of many of those
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halocarbon
gases that are both ozone-depleting and greenhouse
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gases (e.g., CFCl3 and CF2Cl2), are either increasing more
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slowly
or decreasing, both in
response to reduced emissions
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under the
regulations of the Montreal Protocol and its
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Amendments.
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| q |
Their
substitute compounds (e.g., CHF2Cl and CF3CH2F) and
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some other
synthetic compounds (e.g., perfluorocarbons (PFCs)
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and
sulphur hexafluoride (SF6)) are also greenhouse gases, and
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their
concentrations are currently increasing.
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