Learn about EPA's efforts to address ozone layer depletion through international treaties and initiatives. The Paris Agreement is a legally binding international treaty on climate change.The international agreements do show that the world is capable of dealing with a global scale environmental threat, resulting from advanced technology. The Earth's ozone layer is on track to recover within four decades, a UNbacked panel of experts said on Monday. Later amendments to the Montreal Protocol completely phased out production of CFCs. The Montreal Protocol is considered the most successful international environmental agreement to date.