Montreal Protocol on Substances that Deplete the Ozone Layer

The Montreal Protocol is an international treaty designed to protect the Earth’s ozone layer by phasing out the production and consumption of substances known to cause ozone depletion. These substances include chlorofluorocarbons (CFCs), hydrochlorofluorocarbons (HCFCs), halons, and other ozone-depleting chemicals. The protocol was adopted in 1987 and has been amended several times to accelerate the phase-out schedules. It has been successful in significantly reducing the emissions of ozone-depleting substances and allowing the ozone layer to recover over time. The protocol is considered a landmark achievement in global environmental governance.