The United Nations Conference on Environment and Development (UNCED), also known as the Rio Summit, Rio Conference, and Earth Summit (Portuguese: ECO92 [ˈɛku no̞ˈvẽtɐ j ˈdojʃ]), was a major United Nations conference held in Rio de Janeiro from 3 to 14 June 1992.
In 2012, the United Nations Conference on Sustainable Development was also held in Rio, and is also commonly called Rio+20 or Rio Earth Summit 2012. It was held from 20 to 22 June.
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