Driving in **fog** is a dangerous situation because it reduces the visibility of the road, signs, and other vehicles. Additionally, the moisture in the environment can cause the **vehicle's windows to fog up**, further worsening visibility.

- To prevent the windows from fogging up, it is important to **keep the cabin well ventilated**. This helps to balance the temperature and humidity inside the vehicle with the outside, preventing condensation on the windows.

- Other safety measures when driving in fog include turning on the dipped headlights and fog lights, driving slowly, and maintaining a safe distance from other vehicles.


Therefore, keeping the cabin well ventilated is essential to ensure good visibility and safe driving in foggy conditions.