An association of Utah doctors is calling for more stringent limits on air pollution in light of new evidence they say shows air quality is more critical to human health than once thought. Denni Cawley, executive director of Utah Physicians for a Healthy Environment, said her group would like to see state leaders reconsider their plans for growth in light of recent studies. The advocacy group had scheduled an early-afternoon news conference on Wednesday to highlight the issue. The physicians po... <iframe src="http://www.sltrib.com/csp/mediapool/sites/sltrib/pages/garss.csp" height="1" width="1" > </frame>