What is the best way to prevent or stop Carbon Monoxide poisoning while driving?

The most effective way to prevent or stop Carbon Monoxide poisoning while driving is to stop the engine and get out of the vehicle. Carbon Monoxide is a colorless, odorless gas that can build up in an enclosed space, such as the cabin of a vehicle, particularly if there is a malfunction in the exhaust system, which can lead to dangerous concentrations of this gas.

When you stop the engine, you cut off the source of the Carbon Monoxide, allowing any accumulated gas to dissipate. Getting out of the vehicle also moves you to a space where you are no longer at risk of inhaling this toxic gas. It is crucial to seek fresh air immediately, as even short-term exposure to Carbon Monoxide can have serious health effects.

The other choices do not address the immediate danger of Carbon Monoxide exposure effectively. Slowing down does not have a significant impact on the amount of exhaust fumes being produced. Turning on the AC or the heat could potentially circulate the Carbon Monoxide within the vehicle, leading to further exposure rather than reducing it.