What does leaving your car outside do to the paint?

What does leaving your car outside do to the paint?
Direct sunlight will slowly oxidize the paint on a car. Some car companies (mostly European automakers) use higher quality paint than others, which allows for a much longer lifetime of the paint. Oxidation will often present itself as discoloration of the paint or cloudy/foggy clear coat. Eventually it will cause the clear coat to begin to flake of, which then leads to rust problems. Sunlight will also cause plastic headlamps to become foggy and yellowed and the interior of a car can suffer as well. Often dashboards will become fragile and crack and carpet will fade. All of this can be somewhat prevented through proper cleaning and care.
1. Wax your car with a UV protective product regularly.
2. Use a windshield cover to prevent light from entering when the car is parked.
3. Use UV protective and conditioning products on the dashboard, tires, leather seats, and other plastic, vinyl, or leather in the car.
4. Use something like a UV protecting Scotch Guard on any fabrics to prevent discoloration.
5. Have UV reducing window tint installed.