Contraction & Convergence (C&C) is the name of a Global CO2 emissions management model.
In honour of Nelson Mandela it has been projected as 'Climate Truth & Reconciliation'.

C&C was created by the Global Commons Institute (GCI) between 1989 & 1994.
GCI introduced C&C model at COP-2 in Geneva in 1996. In principle it was agreed at COP-3 in 1997.

As Joke Waller Hunter said after becoming the 2nd UNFCCC Executive Secretary in 2002 & the UNFCCC
repeated at COP-9 in Milan, "UNFCCC-compliance inevitably requires contraction and convergence".

C&C is also called 'The Well Tempered Climate Accord' (WTCA) as the internally convergent-parts of C&C
always add up to or commute with the global contraction-event as a whole required for UNFCCC-compliance.

GCI declared a global climate emergency at COP-2 as rates of climate change already threatened extinction.
Unless we complete a C&C-event at rates that avoid that threat, the reality of it will grow to overwhelm us.

What was already an emergency in 1996 has worsened. In 2019 it is now a crisis that many describe,
as an existential threat. There is now a requirement for minus 218 tonnes carbon emissions per second.

Some links to further information are here

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