| Year | Event |
| 1972 |
United Nations Conference on the Human Environment (Stockholm, June 1972). Startup of the United Nations Environment Programme (UNEP) |
| 1975 |
Intergovernmental Meeting on the Protection of the Mediterranean (Barcelona, February 1975) |
| 1987 |
Gro Harlem Brundtland, former Prime Minister of Norway, authors the report “Our common future” for the United Nations First expression in an official document of the concept “sustainable development” |
| 1992 |
United Nations Conference on Environment and Development, “Earth Summit” (Rio de Janeiro, June 1992). |
| 1994 |
International Convention to Combat Desertification in those Countries Experiencing Serious Drought and/or Desertification (Paris, June 1994) |
| 1995 |
Plenipotentiary Conference on the Convention to Protect the Mediterranean Sea from Pollution (Barcelona, June 1995). |
| 1995 |
Second Environment Conference of Regional Ministers and Political Leaders in the European Union (Valencia, November 1995). |
| 1996 |
United Nations Habitat II Conference on Human Settlements (Istanbul, June 1996) |
| 1997 |
UN General Assembly: special session on the environment and development “Rio +5” (New York, June 1997) |
| 1999 |
International Conference on Synergies in Desertification Processes in the Mediterranean Region (Perpignan, March 1999) |
| 2000 |
UN General Assembly: Millennium Declaration – Millennium Development Goals (New York, September 2000) |
| 2002 |
World Summit on Sustainable Development (Johannesburg, August 2002). |
| 2005 |
Millennium Ecosystems Assessment (March, 2005). |
Source: Programme Azahar compilation.