What were countries to do if they signed the Montreal Protocol?
Countries that signed the Montreal Protocol were to reduce and stop using chlorofluorocarbons, hydrochlorofluorocarbons, hydrofluorocarbons.
Countries that signed the Montreal Protocol on Substances that Deplete the Ozone Layer were to reduce and stop using specific substances that are responsible for the hole in the ozone layer. Chlorofluorocarbons (CFCs), hydrochlorofluorocarbons (HCFCs), hydrofluorocarbons (HFCs) are depleting the ozone layer.
The Montreal Protocol was signed in 1987 and required developed countries to reduce their production of the chemicals mentioned above by 80% when compared to production levels in 1986. The next step was to reduce levels of these same chemicals by 50% compared to their production levels in 1989. CFCs were phased out completely by 1996. HFCs will no longer be in use by 2030.
For developing countries, CFCs were phased out by 2010 and HCFCs will no longer be in use by 2040.
The Protocol has been amended and adjusted since 1987. As of 2009, the Montreal Protocol received full ratification by all 197 countries that are members of the United Nations (UN).