the air would be bad if no one lived there. sea ,no rain, little wind,mount,off gasing from
oil in the ground .the natives stayed away the best they could.
Not enough EFFICIENT public transportation, the ingrained car culture, too many people, too many cars, people staying to themselves so they don’t like public transportation, people feeling entitled to doing what they want instead of what’s better for the environment
Because of the traffic that makes air quality bad for Southern CA.