Invisible Particles, Visible Harm
"Studies Are Homing in on Which Particles Polluting the Air Are Most Sickening -- and Why"
Source: Science News, 07/06/2009
Anything related to air quality, air pollution, or the atmosphere
After several years of preparatory work, EPA is expected to announce by June 26, 2009, its proposed primary standard for one of the six "criteria" air pollutants, nitrogen dioxide.