>You want me to support your political campaign to regulate the gas that I exhale, because otherwise there will be a doomsday, and if I don't agree I'm either stupid or evil? Ehhhhh, no thanks.
The fact that you exhale co2 is just not relevant. It's not your exhalation that is menacing the future of humans and other animals. It's the "exhalations" of industrial-scale energy generation (and also industrial-scale agriculture, etc) that are the problem. Surely you see that, yes?
> stupid or evil
I'm not accusing you, but there absolutely are some evil people at work here. These are people who know (and in many cases have known for decades) that what they're doing - large scale atmospheric dumping of co2 - is going to cause real harm and suffering to fellow humans, but choose to do it anyway because they personally profit from it and their wealth insulates them from the consequences within their lifetime.