soot

Step outside and take a long, deep breath. Was the air clean and fresh or are you hacking up a lung? Read the American Lung Association's 2007 State of the Air Report and more ways you can reduce outdoor air pollution.

The House Gov't Oversight Committee holds a hearing to examine the role of black carbon, or "soot," as a factor in climate change and receive testimony from experts regarding its global and regional impacts, its sources, and the risks it raises for public health.

Utility fined a second $25,000 for again allowing a blanket of black soot containing arsenic, lead and other heavy metals to rain down on properties near its PA power plant... in Beaver County.