You say "compellingly demonstrate that CC is occurring that mankind has significantly contributed to it and some likely scenarios for what will happen", I say "proof". I think mine is snappier and yours is more factually correct. I've seen neither.
Don't get me wrong, I've seen all sorts of reports that make headway (for both arguments) but none that has enough weight to warrant or proclude the wholesale change to the way people live their lives. I suggest this is the problem.
The Lung Cancer/Smoking analogy is nearly good except there are physical and psychological addictions in addition to the simple habit and reluctance to change. The science of the connection between lung cancer and smoking is, of course, complicated and offers sources of deniability (Japan paradox for example) but the case has been made to the point that people do smoke less these days (and the majority of the population support removal of smoking in public places).
Evolution, similarly, offers deniability in that the mechanisms aren't completely understood but the massive weight of evidence in support that there haven't been this range of species on Earth for the lifetime of the planet points toward evolution being closer to the answer than creationism. People whose faith is shaken by the idea will use the deniability to justify their faith but the consensus is fairly easy to follow.
None of this is the case for CC, we're told there's scientific consensus but the reasons for that consensus are a lot less obvious, there's also a lot of evidence that supports the negative case. (For example the Vostock ice-core data clearly debunks the idea that CO2 lags temperature but it also debunks the idea that the reverse is universally true). Until the evidence clearly leans one-way or the other you cannot possibly suggest fixes, even more so if those fixes negatively impact peoples' lives). Why can't they get on with the science and suggest fixes when it's actually more understood ? Why do we have to act NOW when there's not enough evidence to suggest that acting will have a positive effect?
Sure, an asteroid might be heading towards Earth but do we know for certain that it's going to hit or is getting Bruce Willis to dust off his vest and go drilling actually going to divert it towards us ?