The United Nations Rio+20 Conference on Sustainable Development is going to take place in Rio de Janeiro 11 - 22 June 2012.
Under the overall title "SUSTAINABLE DEVELOPMENT IN THE 21ST CENTURY (SD21)" the secretariat in charge of organizing the conference (United Nations Department of Economic and Social Affairs, Division for Sustainable Development) has compiled background material on different key topics to be discussed in Rio.
Cities - urban issues - is one of the key topics.
My report on urban challenges can be downloaded here:
The text is one of about ten background reports, which are available at:
The publication is going to be published by the UN in an event in Rio de Janeiro 17 June.