MEAs are legally binding International Agreements between three or more state parties based on a common environmental goal. International environmental agreements (IEAs) are signed treaties that regulate or manage human impact on the environment in an effort to protect it.To sign up for updates from the U.S. delegation to COP28, please fill out this form. This is a list of international environmental agreements. Most of the following agreements are legally binding for countries that have formally ratified them. ICAO serves as a multilateral platform for cooperation on international aviation environmental protection.