How to Alleviate Air Pollution in Los Angeles, CA

How to Alleviate Air Pollution in Los Angeles, CA

Paper instructions:
This should be a case study identifying the following points of the smog and air quality problem in Los Angeles, CA USA:
Symptoms - air quality/lack of
Diagnosis - lack of public transportation, cars adding to pollution
Cure - encourage less driving, more carpooling, anything else to alleviate air pollution?