South America
BRAZIL- Invited to Participate by the UN Commission on Sustainable Development and United Nations Environment Program at various events of Rio+20 Earth Summit, the UN conference on environment and development issues, Rio de Janeiro, Brazil, June 17-25, 2012.
- Invited to Chair a session and as key note speaker and present two papers in an international conference in Chile, co-organised by the Chilean Research Center of Mining and Metallurgy (CIMM) in collaboration with the UNEP, France, to be held at City of Pucon, during April 27-29, 2009.
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