If CO2 were a real problem and we were actually interested in solving it, engineering solutions are not a option, they are the only option if the alarmists are correct. We must not only stop putting so much out there, we must actively take out what we have put in.
Yes, I use the word "alarmist" and I'm basically a "doubter"; I'll self-label so there's no need to accuse. A small-but-significant portion of the reason why is the fundamental unseriousness of the alarmists on this point; if it's a problem, then let's fix it, not use global warming as an excuse to implement a whole raft of policies that oh-so-coincidentally you wanted even before it's was a problem and not-so-coincidentally aren't all that effective against global warming.
(The whole "we can't afford to take engineering risks we don't understand" is complete nonsense. Apparently we know with 100% certainty what is coming down the pike with our current emissions, and that is Complete Doom. It's hard to beat a negative like that and... frankly, engineering isn't exactly unfamiliar with that condition anyhow. Apparently we can predict the climate with 100% certainty unless we actually try to use this knowledge to fix the problem, and we must instead only engage in actions that by the IPCC's own admission and models will cost trillions and do next-to-nothing. See, I just have trouble wrapping my head around this whole meme-complex as an engineer; either we have a real problem and engineering solutions should be on the table, or engineering solutions shouldn't be on the table because we don't have a real problem, but trying to split the difference is just inconsistent. BTW, if you believe in AGW but you also believe that engineering solutions should be on the table then I would not label you an alarmist; I reserve the term for those who are using nakedly using AGW as a means of advancing all-but-unrelated political agendas, not those who honestly believe there's a problem that should be solved in the most effective manner possible, whatever that may turn out to be. I don't really agree that this is a problem (there are great problems but they lie elsewhere and don't have one nice catch-phrase), but if I'm wrong, hey, let's fix it! It's worth saying again.)