Contraction and Convergence

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Contraction and Convergence (C&C) is a proposed strategy for reducing greenhouse gas emissions to combat climate change. Conceived by the Global Commons Institute in the early 1990's, the Contraction and Convergence strategy consists of reducing overall emissions of greenhouse gases to a safe level, 'Contraction', where the global emissions are reduced because every country brings emissions per capita to a level which is equal for all countries, 'Convergence'.

It is intended to form the basis of an international agreement which will reduce carbon emissions to avoid global warming. It is expressed as a simple mathematical formula. This formula can be used as a way for the world to stabilize carbon levels at any level. The supporters of Contraction and Convergence anticipate that future negotiations would focus solely on what that final level should be.