Excess CO2, and the impacts on human cognition from it, are the great threat to civilization. We need geoengineering to strip CO2 out of the atmosphere. Iron seeding* and global Carbon Taxes seem like the best options.
It doesn't really matter if it's in your house or not; the problem is global warming that's caused by the greenhouse effect that's caused by the CO2 in the upper atmostphere. I like the cut of your gib though.
Indoor CO2 scrubbers (even just to separate CO2 from inside air and exhaust it outside) would be a great technology right now, since it would allow us to reduce ventilation requirements and thus save on heating/cooling costs.
https://en.wikipedia.org/wiki/Iron_fertilization
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