heart health respiratory health the rate of birth defects weight and physical fitness
I gave my students this multiple choice question: Vehicle exhaust contains a form of pollution called particulate matter. Technologies are being developed to reduce the amount of particulate matter in exhaust. A vehicle that produces less particulate matter would have the greatest impact on which aspect of human health?

Only one answer is correct among these 4 choices:
- heart health
- respiratory health
- the rate of birth defects
- weight and physical fitness

Could you tell me which one is correct?

respiratory health