What is 'carbon monoxide poisoning' in motor vehicles, and how can it be prevented during cold winter weather?

1. Inhaling toxic, odorless exhaust fumes; prevented by never running the engine in enclosed spaces or sleeping in an idling car with closed windows
2. Poisoning from drinking windshield washer fluid
3. A condition caused by dirty air conditioning filters in summer
4. Overheating of the catalytic converter caused by low tire pressure