Under Tony Abbott, it seemed that the hardline climate denialists of the Liberal Party had achieved a remarkable victory. A man who declared he would not lead a party that wasn't as committed to climate action as he was had been purged from the leadership in a successful putsch; his replacement was a man who dismissed climate science as "crap", and he was successfully savaging Labor for taking climate action, based on an entirely invented scare campaign about price rises.

But now, remarkably, they have gone one better. The problem with Abbott was always that the man he forced out, the man who crossed the floor to vote for an emissions trading scheme, might always strike back. And strike back he did, sending Abbott packing from the prime ministership in 2015. But what looked like a defeat for climate denialists has become a remarkable win: Malcolm Turnbull, has joined the denialist camp himself.