ScienceDaily: Emissions of the air pollutant sulfur dioxide have been dramatically decreased during the past 30 years but for some people even a little inhaled sulfur dioxide may still be too much. "Asthmatics are particularly sensitive to sulfur dioxide and can be more likely to suffer asthma complications but scientists still don't know exactly why that is so," said Bill Ameredes, director of the Inhalation Toxicology Core Facility of the Sealy Center for Environmental Health and Medicine at the University...