Earth at Rio+20 Author Downes D. Journal/Series The Environmental Forum : The Policy Journal of the Environmental Law Institute | Vol.29 (3): p. 36-41; 6 p. Date 2012 Source IUCN (ID: ANA-086464) Publisher | Place of publication The Environmental Law Institute | Washington, DC, USA ISSN 0731-5732 Document type Article in periodical Language English Country/Territory United States of America Subject Environment gen. Keyword Sustainable development