Since you're not actually outside, you might not think much about the sun exposure your skin undergoes while you're driving. But your windows don't protect you from the UV radiation beaming through them, which results in the left side of your face experiencing significantly more sun damage than your right. To prevent this, make sure you apply sunblock before you leave on a sunny day, especially if you're going to spend a good amount of time behind the wheel. You can also invest in a UV-resistant windshield and tinted windows.