Researchers are seeking better ways to control air pollutants — including those in the Phoenix area where the ozone layer is among the more serious atmospheric threats to human health. So says the American Lung Association, which has ranked the city as the fifth most ozone-polluted metro area in the U.S. Solutions are now being sought by ASU researchers, including urban air quality and pollution control expert Matthew Fraser, a professor in the School of Sustainable Engineering and the Built Environment, part of the Fulton Schools. He’s teaming with Professor Peter Herkes in ASU’s School of Molecular Sciences and two ASU doctoral students to investigate possible solutions. See a related earlier report on this page dated July 24.