Federal and state laws are currently in place to create regulations that may add regulatory burdens for those involved in the oil and gas industry. Additionally, the Clean Water Act and similar state laws require permits to be obtained for discharge into surface waters or to construct facilities in wetland areas. The Clean Air Act of 1970 and its subsequent amendments in 1990 and 1997 also impose certain restrictions on point source emissions of volatile organic compounds, including nitrogen oxides, sulfur dioxide and sulfur dioxide, with certain operations.