Which would have the most significant effect in reducing Florida’s air pollution?

A widespread transit system would let more people travel by bus or rail instead of driving individual cars. Since vehicle exhaust is a major source of air pollution, reducing the number of car trips could make a large difference. Limiting each family to one car would not necessarily reduce how often people drive, while banning fireplaces and campfires would address a smaller source.

AI-written and checked against the verified answer.