Bolt: Have you got a number? I mean, there must be some numbers.

Flannery: I just need to clarfy in terms of the climate context for you. If we cut emissions today, global temperatures are not likely to drop for about a thousand years.

Bolt: Right, but I just want to get to this very basic fact, because I’m finding it really curious that no one has got (this) fact. If I buy a car … I want to know how much it costs and whether it is going to do the job.

Flannery: Sure.

Bolt: In this case I want to know the cost of cutting our emissions by 5 per cent by 2020 and will it do the job: how much will the world’s temperatures fall by if Australia cuts its emissions by this much.

Flannery: Look, as I said it will be a very, very small increment.

Bolt: Can you give us a rough figure? A rough figure.

Flannery: Sorry, I can’t because it’s a very complex system and we’re dealing with probabilities here.