Climate Change 2001:
Working Group III: Mitigation
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Umbrella Group
A set of largely non-European developed countries who occasionally act as a negotiating bloc on specific issues.

United Nations Framework Convention on Climate Change (UNFCCC)
The Convention was adopted on 9 May 1992 in New York and signed at the 1992 Earth Summit in Rio de Janeiro by more than 150 countries and the European Economic Community. Its ultimate objective is the “stabilization of greenhouse gas concentrations in the atmosphere at a level that would prevent dangerous anthropogenic interference with the climate system”. It contains commitments for all Parties. Under the Convention Parties included in Annex I aim to return greenhouse gas emission not controlled by the Montreal Protocol to 1990 levels by the year 2000. The Convention entered in force in March 1994. See also Conference of the Parties and Kyoto Protocol.

An expression of the degree to which a value (e.g., the future state of the climate system) is unknown. Uncertainty can result from lack of information or from disagreement about what is known or even knowable. It may have many types of sources, from quantifiable errors in the data to ambiguously defined concepts or terminology, or uncertain projections of human behaviour. Uncertainty can therefore be represented by quantitative measures (e.g., a range of values calculated by various models) or by qualitative statements (e.g., reflecting the judgement of a team of experts).

See United Nations Framework Convention on Climate Change.

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