> "In a study conducted by SenseAir, they found that with 4 adults in a car, the CO2 level could reach 6,000 ppm even with the fresh air ventilation turned on. This is important to know, as between 10 and 30% of all automobile accidents are attributed to drowsiness."
That sounds like an extraordinary claim. There have been discussions on HN before about CO2 levels in classrooms and offices, and what it might cost for education and productivity, and discussions about if atmospheric CO2 levels approached thousands of ppm and lowered the effective intelligence of every living person. But they were speculative comments. This claim that inside cars it easily reaches into their "levels associated with complaints of drowsiness [...] headaches, sleepiness [...] maybe poor concentration, loss of attention" is significant.
They say 10-30% of car accidents are attributed to drowsiness, the NHTSA estimates 43k people died in car accidents last year, is that also 10-30% of fatal car accidents attributed to drowsiness? Or 4k-12k deaths/year? And compared to the billions spent on self-driving cars, how much is spent on ventilation and cabin CO2 monitoring?
[1] https://www.nhtsa.gov/press-releases/early-estimate-2021-tra...