International Day for the Preservation of the Ozone Layer of the hole in the ozone layer was observed 30 years after the protocol was signed. Due to the nature of the gases responsible for ozone depletion their chemical effects are expected to continue for between 50 to 100 years. International Day for the Preservation of the Ozone Layer September 16 was designated by the United Nations General Assembly as the International Day for the Preservation of the Ozone Layer. This designation had been made on December 19, 2000, in commemoration of the date, in 1987, on which nations signed the Montreal Protocol on Substances that Deplete the Ozone Layer.
UNEP OzonAction Multilateral Fund for the Implementation of the Montreal Protocol was set up. The Fund's "main objective is to assist developing country parties to the Montreal Protocol whose annual per capita consumption and production of ozone-depleting substances is less than 0.3 kg to comply with the control measures of the Protocol". UNEP’s OzonAction branch is one of the Fund’s implementing agencies, along with others, such as UNIDO, UNDP and the World Bank. Official website UNEP OzonAction OzonAction is a branch of the United Nations Environment Programme (UNEP) which has its main office in Paris, and is part of UNEP's Division of