Michael Jerrett - These findings should give us some pause to think about...

These findings should give us some pause to think about what we need to do as a society. Restrictions on tailpipe emissions have gotten tighter, but there are more trucks and cars on the roads and people are driving farther. This study may cause us to reflect on how we use our cars, what cars we drive and whether we can do anything to make tailpipe emissions from all vehicles less harmful to health.