Heavy rain falling at the Rio Centre venue. Several days of heavy rain is unusual at this time of year. United Nations Conference on Sustainable Development (Rio+20), Rio de Janeiro, Brazil. Photo © Sue Cunningham.

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Photo credit: © Sue Cunningham / Alamy / Afripics
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Keywords: 2012, america, brasil, brazil, brazilian, cidade, conference, de, development, environment, environmental, environments, janeiro, latin, maravilhosa, nations, rio, rio+20, rj, south, state, sustainable, uncsd, united