The 몬트리올 의정서 (Montreal Protocol) is an international treaty designed to protect the ozone layer by phasing out the production and consumption of substances that deplete it. Adopted in 1987, it focuses on chemicals like chlorofluorocarbons (CFCs) and halons, which are commonly found in refrigeration, air conditioning, and aerosol products. The protocol has been successful in reducing the use of these harmful substances, leading to a gradual recovery of the ozone layer. It is considered one of the most effective environmental agreements, with nearly all countries participating, demonstrating global commitment to environmental protection and sustainability.