/tags/asthma Asthma en-US Copyright Mon, 23 Jun 2014 09:00:00 GMT /environment/2014-06-23/study-air-quality-restrictions-linked-with-improved-respiratory-health Duke University researchers have found a connection between state and federal air pollution restrictions and improved public health in North Carolina.Duke… Mon, 23 Jun 2014 09:00:00 GMT /environment/2014-06-23/study-air-quality-restrictions-linked-with-improved-respiratory-health Rebecca Martinez