Is it okay to leave the car idling overnight with the air conditioning on?

[KalebLee]

It is possible to leave the car idling overnight with the air conditioning on, but the biggest issue is fuel consumption, followed by waste. The hazards of idling the car with the air conditioning on are as follows: Idling produces toxic substances: Keeping the air conditioning on after parking means the engine is only running at idle speed, which can lead to incomplete combustion of gasoline. Unburned gasoline produces toxic substances such as carbon monoxide. If the car doors and windows remain tightly closed for a long time, exhaust fumes can enter the sealed compartment and accumulate to a level that can cause carbon monoxide poisoning. Risk of poisoning: Additionally, passengers inside the car exhale large amounts of carbon dioxide. In the hot summer weather, oxygen consumption in the compartment is higher than in other seasons. As the oxygen level in the sealed car gradually decreases, over time, passengers may experience symptoms such as dizziness, nausea, and general weakness, which are clear signs of carbon monoxide poisoning.