Protecting the Ozone Layer: Lessons, Models, and Prospects Since the mid-1980s, the international community has adopted several significant instruments designed to reverse the degradation of the life support systems of the planet. None of these international agreements have been as successful as the 1987 Montreal Protocol in creating the incentives and mechanisms for protecting the ozone layer. Through the efforts of industry, government and public interest groups, national commitments and achievements have progressed further and faster than expected, while the list of controlled...