United Nations Framework Convention on Climate Change (UNFCCC)
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It is an international environmental treaty (currently the only international climate policy venue with broad legitimacy, due in part to its virtually universal membership) negotiated at the United Nations Conference on Environment and Development (UNCED), informally known as the Earth Summit, held in Rio de Janeiro from 3 to 14 June 1992.
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The UNFCCC was adopted on 9 May 1992, and opened for signature on 4 June 1992, after an Intergovernmental Negotiating Committee produced the text of the Framework Convention as a report following its meeting in New York from 30 April to 9 May 1992.
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It entered into force on 21 March 1994. As of March 2014, UNFCCC has 196 parties.
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The objective of the treaty is to “stabilize greenhouse gas concentrations in the atmosphere at a level that would prevent dangerous anthropogenic interference with the climate system”.
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The treaty itself set no binding limits on greenhouse gas emissions for individual countries and contains no enforcement mechanisms.
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In that sense, the treaty is considered legally non-binding. Instead, the treaty provides a framework for negotiating specific international treaties (called “protocols”) that may set binding limits on greenhouse gases.