List of World Conferences convened by the UN on environment and development: http://www.un.org/geninfo/bp/intro.html
Key conferences:
1) Conference on the Human Environment, Stockholm, 1972: http://www.unep.org/Documents.Multilingual/Default.asp?documentid=97&articleid=1503
- Resulted in declaration
2) Earth Summit, Conference on Environment and Development, Rio, 1992: http://www.unep.org/Documents.Multilingual/Default.asp?documentid=78&articleid=1163
- Resulted in declaration
3) World Summit for Social Development, Copenhagen, 1995: http://www.un.org/esa/socdev/wssd/text-version/index.html
- Resulted in consensus on the need to put people at the centre of development (largest to date)
4) Special Session to assess the achievements since Copenhagen, 2000: http://undesadspd.org/Home/Geneva2000.aspx
- Resulted in agreement on a range of new initiatives for social development
5) Conference on Sustainability (Rio +20), 2012: http://www.uncsd2012.org/about.html
- Resulted in adoption of "The Future We Want": http://www.un.org/en/sustainablefuture/