Permalink: https://media.greenpeace.org/archive/Sign-near-Black-Thunder-Mine-in-USA-27MZIFVORTA4.htmlConceptually similarSign near Black Thunder Mine in USAGP04EF3Completed★★★★Powder River Basin MiningGP04EF9Completed★★★★Powder River Basin MiningGP04EFACompleted★★★★Sign near Black Thunder Mine in USAGP04EF8Completed★★★★Black Thunder Coal Mine in USAGP04EFGCompleted★★★★Black Thunder Mine in USAGP04EG3Completed★★★★Black Thunder Mine in USAGP04EG4Completed★★★★Black Thunder Mine in USAGP04EG1Completed★★★★Black Thunder Mine in USAGP04EG2Completed★★★★View AllGP04EF2Sign near Black Thunder Mine in USAWarning signs off Rt 450 on Hilight Road near the Black Thunder mine outside Wright. Orange clouds indicate a high concentration of nitrogen oxides, including nitrogen dioxide. When inhaled, nitrogen dioxide becomes nitric acid as it encounters moisture in the lungs. Exposure to the gas can cause respiratory problems, lung damage and even result in death.Locations:North America-United States of America-WyomingDate:18 Oct, 2012Credit:© Greenpeace / Tim AubryMaximum size:3716px X 3040pxKeywords:Air pollution-Climate (campaign title)-Coal-Coal mines-Coal mining-Danger-Day-Fossil fuel (energy)-Grass-KWCI (GPI)-Outdoors-Signs-Surface miningShoot:Powder River Basin Coal Documentation in USAThe Powder River Basin of northeast Wyoming and southeast Montana region is known for its coal deposits. Lying between the Black Hills and the Bighorn mountain range, the PRB is about 120 miles (193 km) east to west and 200 miles (322 km) north to south. The U.S. Bureau of Land Management says there are 13 active coal mines in the Wyoming portion of the Powder River Basin. These mines produced about 496 million short tons (450 million metric tons) as of September 2009. The PRB is the single largest source of coal mined in the United States and contains one of the largest deposits of coal in the world. Most of the active coal mining in the Powder River Basin actually takes place in drainage of the Cheyenne River. Because of the Powder River Basin, Wyoming has been the top coal-producing state in the United States since 1988.The majority of the coal mined in the PRB is part of the Fort Union Formation. Because of its low sulfur and fly ash content, this coal is exported outside the region. In 2007, the Powder River Basin alone produced 436 million short tons (396 million tonnes) of coal, more than twice the production of second-place West Virginia, and more than the entire Appalachian region. Overall, the Powder River Basin accounts for about 37 percent of U.S. coal production.Related Collections:Powder River Basin Coal Documentation (Photos + Videos)