Question

how can you prevent carbon monoxide poisoning?
never leave your vehicle running in an enclosed space, like a garage.
keep your windows rolled up at all times.
replace your cabin air filter frequently.
allow your vehicle to idle for at least 10 minutes to warm up before driving on cold days.

Explanation:

Carbon monoxide is a dangerous gas produced by incomplete combustion. Running a vehicle in an enclosed space allows carbon - monoxide to accumulate. Keeping windows rolled up, frequent cabin air - filter replacement, and long idling do not prevent carbon - monoxide poisoning.

Answer:

Never leave your vehicle running in an enclosed space, like a garage.