Ozone Hole — Environmental Laws

Entry	Year	Description	Impact
Kigali Amendment	2016	The Kigali Amendment to the Montreal Protocol added a phasedown framework for hydrofluorocarbons under the Montreal Protocol. HFCs have substantial warming impacts but do not contain the chlorine or bromine responsible for the ozone-depletion mechanism associated with CFCs and halons.	Extends the Montreal system to a related climate problem arising from refrigerant transitions. It complements ozone protection while requiring the distinction between ozone-depletion potential and warming impact to remain explicit; it is not a new carbon-dioxide commitment under the Paris Agreement.