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Reference.org
Rio Declaration on Environment and Development
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<p>The Rio Declaration on Environment and Development, often shortened to Rio Declaration, was a short document produced at the 1992 <a href="/facts/United_Nations_Conference_on_Environment_and_Development/m43Ql7gs">United Nations Conference on Environment and Development</a> (UNCED), informally known as the Earth Summit. The Rio Declaration consisted of 27 principles intended to guide countries in future sustainable development. It was signed by over 175 countries. </p>