1. A retired professor at the University of North Carolina, Chapel Hill, has developed a sensor that goes beyond the usual chemical monitor. This portable device checks the air for smog components that hurt human health.

    Gizmo Uses Lung Cells To Sniff Out Health Hazards In Urban Air

    NPR Video Credits:
    Produced by: Adam Cole
    Senior Producers: Vikki Valentine and Ben de la Cruz 
    Music: Brise Napolitaine, Django Reinhart and Guerino