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The largest Antarctic ozone hole recorded (September 2006) 2012 retrospective video by NASA on the Montreal Protocol The Montreal Protocol on Substances That Deplete the Ozone Layer is an international treaty designed to protect the ozone layer by phasing out the production of numerous substances that are responsible for ozone depletion.
The Montreal Protocol was originally created to preserve and restore the ozone layer; participating countries agreed to phase out chlorofluorocarbons (CFCs), gases that had been causing ozone depletion. HFCs do not contain chlorine, so they do not cause ozone depletion, and therefore have been replacing CFCs under the Protocol. [4]
The treaty outlines a schedule for the phase-out of key substances such as CFCs, HCFCs, and halons. The Kigali Amendment to the Montreal Protocol, agreed upon in 2016, included provisions for the phase-down of HFCs, which are potent greenhouse gases but do not deplete the ozone layer. [5]
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The CAA ozone program is a technology transition program intended to phase out the use of chemicals that harm the ozone layer. [15] Consistent with the US commitments in the Montreal Protocol, CAA Title VI, added by the 1990 CAA Amendments, mandated regulations regarding the use and production of chemicals that harm Earth's stratospheric ozone ...
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