Contraction and Convergence

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 CONVERGE recognizes the original meaning of “Contraction and Convergence” (C&C) to be the science-based, global climate-policy framework, proposed to the United Nations since 1990 by the Global Commons Institute (GCI)[1].

Contraction is understood as the existence and acceptance of a full-term contraction budget for global emissions of greenhouse gasses consistent with stabilising atmospheric concentrations at a pre-agreed concentration maximum deemed to be safe (based on Intergovernmental Panel on Climate Change – IPCC) modelling.

Convergence relates to (negotiated) international sharing of this budget as ‘entitlements’ resulting from a negotiable rate of linear convergence to equal shares per person globally by an agreed date within the timeline of the full-term contraction/concentration agreement[2].

CONVERGE thus understands C&C to be founded on the principles of equitability, resource conservation and sustainable development over the long term. C&C is not primarily ‘re’-distributive in nature; it rather concerns ‘pre’-distribution of future tradable GHG permits within a contraction-mandated budget.