1. http://www.aaas.org/spp/dspp/sfrl/projects/omb/ombltr.htm.
2. National Science Board press statement (23 February 1999).
3. Environmental Protection Agency, Regulatory Impact Analysis for the Particulate Matter and Ozone National Ambient Air Quality Standards and Proposed Regional Haze Rule (Innovative Strategies and Economics Group, Office of Air Quality Planning and Standards, Research Triangle Park, NC, 1997).
4. Researchers and Lawmakers Clash Over Access to Data
5. Although the regulation was finalized in July 1997 it has not been implemented.