What are the dangers of sleeping in a car with the air conditioning on?

[DelHolden]

Sleeping in a car with the air conditioning on carries the risk of carbon monoxide poisoning and carbon dioxide poisoning. The specific details are as follows: 1. Carbon Monoxide: When idling, even outdoors, if there is no wind, carbon monoxide can accumulate around the car, and its concentration increases over time. If the car is set to external air circulation, a significant amount of carbon monoxide from outside can be drawn into the car, leading to carbon monoxide poisoning. 2. Carbon Dioxide: If the windows are tightly closed and the car is set to internal air circulation while sleeping for an extended period, the confined space of the car means that human respiration will deplete the oxygen inside while increasing the concentration of exhaled carbon dioxide. When the carbon dioxide concentration reaches a certain level, it can cause unconsciousness and cerebral hypoxia, with severe cases potentially leading to death.