Environmental NAACP, Medical, Public Health and Environmental Groups Urge Court to Uphold Clean Air Safeguards by Gary Kopycinski on February 22, 2013 Gary Kopycinski Author More in Environmental: People Outside Will Be Injured: Severe Thunderstorms Strike Park Forest March 31, 2026 Park Forest Officials Urge Residents to Protect Pipes as Coldest Air of the Season Continues December 14, 2025 Park Forest Workshops Join Global Effort to Prevent Bird Collisions August 21, 2025 Coal- and oil-fired power plants are the largest industrial source of air toxics; power plants account for approximately half of all the nation’s mercury emissions. (Chris Jordan-Bloch / Earthjustice)