Climate hard - liners in developing countries have long argued that keeping global temperatures to a 2
degree C rise over pre-industrial levels was simply too hot, and would risk unleashing many
of the worst destabilizing impacts
of global warming — including perhaps the triggering
of cascading effects and warming
amplifications within nature, such as the melting
of Arctic permafrost, that could release more greenhouse gases and push temperatures even higher.
If you take the global shift as 6
degrees, that gives you a 36 %
amplification... and that is roughly what the ice - core literature
of two or more decades assumes.