Energy & Environment

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Environmentalists hold a banner at the entrance of the Brazil Pavilion for the Rio+20 United Nations sustainable development summit in Rio de Janeiro
 
Environmentalists hold a banner at the entrance of the Brazil Pavilion for the Rio+20 United Nations Sustainable Development summit in Rio de Janeiro June 20, 2012. The Rio +20 United Nations Conference on Sustainable Development will be held from June 20 to June 22. REUTERS/Nacho Doce (BRAZIL - Tags: ENVIRONMENT SOCIETY POLITICS)