I agree that carbon dioxide exposure is dangerous, but it is probably less dangerous because (TIL) there's a specific brain mechanism that wakes you up when your blood has elevated CO2[0].
On the other hand, carbon monoxide poisoning will only wake you up if its symptoms (among which headache, nausea/vomiting, elevated heart rate, and cardiac arrest seem likely) do so.
On the other hand, carbon monoxide poisoning will only wake you up if its symptoms (among which headache, nausea/vomiting, elevated heart rate, and cardiac arrest seem likely) do so.
[0] https://medicine.uiowa.edu/content/specific-neurons-trigger-...