air pollution

Fracking's air pollution threat

March 27, 2012 - As North Carolina considers lifting its ban on the controversial natural-gas drilling technique known as hydraulic fracturing or "fracking," a growing body of evidence documents serious public-health threats due to air pollution from such operations, which have already been linked to water contamination.

Dumping dioxin on Dixie

January 25, 2012 - As the Environmental Protection Agency readies a long-awaited report on a class of health-damaging pollutants known as dioxins, we look at the biggest industrial dioxin sources in the U.S. -- and find that the South bears a disproportionate toxic burden.

Hexavalent chromium pollution linked to coal ash disposal

February 3, 2011 - An independent report identifies 28 coal ash dump sites from Massachusetts to Nevada where hexavalent chromium has been detected in the groundwater at levels exceeding federal or state standards. Hexavalent chromium is one toxic waste product created by coal-fired power plants known to contain potentially dangerous levels of heavy metals, combustion byproducts and radioactive elements.