It's very important to keep in mind, actually, that the status quo is very costly on a global level. We didn't put a figure on it in our study. However, it would be a huge mistake to limit the discussion to the cost of reducing emissions; we also have to talk about the cost of letting global warming go beyond two degrees.
As you surely know, in the report by economist Nicholas Stern —in 2006—it was suggested that if we don't act on climate change, we will have a permanent loss in GDP worldwide of between 5 and 20%. As far as we're concerned, the choice is fairly obvious.