Maybe we will find out soon enough
Hi levels of co2 in humans causes hallucinations. Think the oracle at Delphi. I have a hypothesis that the same effect occurs in the bible belt of the US. There is much industry and major cities both coasts. Prevailing winds carries pollutants inland. It rains causing acid rainfall. So far this is known. My hypothesis is that the limestone bedrock (which almost exactly mirrors the bible belt) gasses co2 causing hallucinations.
I believe this is about indoor work plsces.
Exposure to carbon dioxide can produce a variety of health effects. These may include headaches, dizziness, restlessness, a tingling or pins or needles feeling, difficulty breathing, sweating, tiredness, and increased heart rate.
Carbon dioxide levels and potential health problems are indicated below:
250-350 ppm: background (normal) outdoor air level
350-1,000 ppm: typical level found in occupied spaces with good air exchange
1,000-2,000 ppm: level associated with complaints of drowsiness and poor air
2,000-5,000 ppm: level associated with headaches, sleepiness, and stagnant, stale, stuffy air; poor concentration, loss of attention, increased heart rate and slight nausea may also be present.
>5,000 ppm: This indicates unusual air conditions where high levels of other gases also could be present. Toxicity or oxygen deprivation could occur. This is the permissible exposure limit for daily workplace exposures.
>40,000 ppm: This level is immediately harmful due to oxygen deprivation.
Carbon Dioxide Detection and Indoor Air Quality Control -- Occupational Health & Safety