An assessment of anthropogenic air pollution effects to resources within the Interior Columbia River Basin

An assessment of existing and potential impacts to vegetation, aquatics, and visibility within the Interior Columbia Basin due to anthropogenic air pollution was conducted as part of the Interior Columbia River Basin Ecosystem Management Project. This assessment used current literature and existing databases to examine the current situation and potential trends due to pollutants such as ammonium, nitrogen oxides, sulfur oxides, particulates, carbon, and ozone. The assessment identifies ecosystems and resources at risk...characterizes pollutant levels and exposures needed to cause effects, discusses the significance of emissions not previously considered in emissions inventories, and describes current visibility in Class I areas within the Interior Columbia River Basin and pollution sources which may impact visibility.