The oil and gas industry is currently developing regulations based on federal and state laws aimed at preventing oil pollution and imposing additional regulatory burdens. Additionally, the Clean Water Act and similar state laws mandate the issuance of permits for discharge into surface waters or the construction of 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 some operations.