I could address some of that, if you wish.
First off, I'm loath as a scientist to discuss which policy options should be taken. We're here as scientists to give you the best available science, so that you can make the best-informed decisions as to a policy.
What is it that the science is saying? The science says, for example, that if we cut emissions of carbon dioxide by 50% globally towards the end of this century and stabilize it, we end up equilibrating at a level with atmospheric carbon dioxide that is four times pre-industrial levels. That's a level that has not been seen since the Jurassic, the Cretaceous, the Triassic, when the dinosaurs roamed. That's not acceptable.
That's one extreme that is not acceptable. Emissions must be cut much more than that and on a time scale of the middle of this century for us to move to a climate that will not have major catastrophic effects on large ecosystems both here and abroad.
The question, then, is what we do. That's up to you. We need to cut emissions. We know what the problem is; the problem is carbon dioxide. We know where it's coming from; it's coming from emissions in the combustion of fossil fuels. It's now up to the engineers, the policy-makers, the economists to put forward the ways by which we can eliminate those carbon emissions into the atmosphere.