AP Environmental Science / Unit 9: Global Change
9.2 Reducing Ozone Depletion
Notes
The Montreal Protocol (1987) phased out CFCs. Replacements include HFCs (which don't harm ozone but are greenhouse gases). The ozone layer is slowly recovering.
Practice
The Montreal Protocol phased out:
Ozone-depleting substances.
HFCs replaced CFCs, but they:
Trade-off.
Since the Montreal Protocol, the ozone layer has been:
A policy success.
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