If they put a serious price on carbon, we would move quickly out of the fossil fuel age and into the renewable future.
Quite, as Stern said: $80 a tonne on CO2-e and we’re done. And given that the UK already has emissions taxes of this sort of magnitude, even if not correctly distributed, all we’ve got to do is a little tinkering (lower petrol duties, higher on coal at coal fired plants sorta stuff) and we’re done.
The point being not that dealing with climate change is going to be horribly expensive. It’s that we’re already paying that price and if we pay it in the correct manner, not the current, then we will be done and dusted.
Oh, and that also means that we don’t have to do any of the other things that Bill McKibben recommends.