Transboundary environmental problems (i.e. environmental problems that affect more than one country across their borders) need negotiated discussions in oirder to arrive at consensus solutions that will then be implemented by all concenting or signatory countries. This is especially true for problems than are global or affect a large number of countries. Such negotiated solutions - called "Multilateral Environmental Agreements" - are usually formulated under the aegis of the United Nations and include scientific data gathering, negotiations, discussions, global conferences, and an Agreement document that is signed by concenting countries. The best known of MEAs, is of course the UN Framework Convention o Climate Change (UNFCCC) under which the Paris Agreement was promulgated in December 2015, and along with the MEAs on biological diversity and dersertification, form the "Big Three" MEAs. InforMEA Explore and learn more about MEAs through the United Nations Information Portal on Multilateral Environmental Agreements A sampling of MEAs since 1972 Intl. Scientific Assessment of Major Global Environmental Issues Brief Objectives of International Conventions MEAs by Thematic Clusters Also see on the GDRC website: MEAs and Cities The Trialogue Waste Management and MEAs Multilateral Agreements and Oceans . Global Climate Change Loss of Biological Diversity Stratospheric Ozone Depletion Freshwater Degradation Desertification and Land Degradation Deforestation and the Unsustainable Use of Forests Marine Environment and Resource Degradation Persistent Organic Pollutants (POPS)

Multilateral Environmental Agreements	Brief Summary	MEA Websites
Climate Change	Summary	Websites
Biodiversity	Summary	Websites
Desertification	Summary	Websites
Long Range Transboundary Air Pollution	Summary	Websites
Oceans and the Law of the Sea	Summary	Websites
The Ramsar Convention on Wetlands	Summary	Websites
Vienna Convention and Montreal Protocol	Summary	Websites
Basel Convention on the Control of Transboundary Movements of Hazardous Wastes and their Disposal	Summary	Websites
CITES	Summary	Websites
Convention on Migratory Species	Summary	Websites