Montreal Protocol has often been called the most successful international environmental agreement .

Halon concentrations have continued to increase, as the halons presently stored in fire extinguishers are released, but their rate of increase has slowed and their abundances are expected to begin to decline by about 2020. the concentration of the HCFCs increased drastically at least partly because for many uses CFCs were substituted with HCFCs.

The Montreal Protocol provides for internationally coordinated control of ozone-depleting substances..

On September 16, 2009, all countries in the United Nations, the Cook Islands, Holy See, Niue and the supranational European Union have ratified the original Montreal Protocol. Timor-Leste being the last country to ratify the agreement, bringing the total to 196.

The main objective of the Multilateral Fund

The main objective of the Multilateral Fund for the Implementation of the Montreal Protocol is to assist developing country parties to the Montreal Protocol whose annual per capita consumption and production of ozone depleting substances (ODS) is less than 0.3 kg to comply with the control measures of the Protocol.

Montreal Protocol

The treaty was opened for signature on September 16, 1987, and entered into force on January 1, 1989.It is believed that if the international agreement is adhered to, the ozone layer is expected to recover by 2050.