To give ourselves a more than 50% chance of avoiding 2 degrees (Celsius) will require a six-fold improvement in our rate of decarbonisation.

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Yet this framing has locked the world into the rigid agenda that brought us to the dead end of Kyoto, with no evidence of any discernable acceleration of decarbonisation whatsoever.

BBC: Academics urge radical new approach to climate change

"Decarbonisation should not mean deindustrialisation", Mr Davey said.

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The point is decarbonisation of power generation.

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Politicians sign up to those policies claiming that they will not hurt, that the technologies needed to make everything all right are available off the shelf, and that there is no real alternative because the decarbonisation policies currently in play are in some way ineluctable consequences of climate science.

ECONOMIST: Climate change