Weathering release occurs of Ca and other ions into surface waters. Rainfall is acidic because atmospheric carbon dioxide dissolves in the rainwater producing weak carbonic acid. In unpolluted environments, the rainfall pH is around 5.6. Acid rain occurs when gases such as sulfur dioxide and nitrogen oxides are present in the atmosphere. These oxides react in the rain water to produce stronger acids and can lower the pH to 4.5 or even 3.0. Sulfur dioxide, SO, comes from volcanic eruptions or from fossil fuels, can become sulfuric acid within rainwater, which can cause solution weathering to the rocks on which it
Inter-Tribal Environmental Council jurisdictional boundaries in Oklahoma. The criteria pollutants being monitored include carbon monoxide, ozone, sulfur dioxides, nitrogen oxides and particulate matter. The United States Congress authorized the Environmental Protection Agency to develop a technological assistance program for Native Americans through the Indian Environmental General Assistance Program Act of 1992. Four main components: The principal objective of the GAP program is to provide opportunities for its member tribes to assess, evaluate and develop plans to address environmental and public health issues. Tribes that desire multi-media programs that address environmental issues can receive technical assistance through the GAP program. The Environmental Protection Agency