"EPA [Environmental Protection Agency] is expected to propose changes to the National Ambient Air Quality Standard for ozone on June 20, 2007. The proposal follows a multi-year review of the science regarding ozone's effects on public health and welfare. If the agency decides to strengthen the standard, it will set in motion a long and complicated implementation process that has far-reaching impacts for public health, for sources of pollution in numerous economic sectors, and for states and local governments. This report discusses the standard-setting process and the specifics of the ozone standard, and describes the steps that will follow EPA's proposal."
CRS Report for Congress, RS22682
U.S. Department of State, Foreign Press Center: http://www.fpc.state.gov/