The Tennessee Air Pollution Control Board will conduct a public hearing to consider the proposed Fine Particulate Matter (PM2.5) SIP and the proposed Regional Haze SIP to protect visibility in Class I areas pursuant to Tennessee Code Annotated Section 68-201-105. The hearing will be held March 25, 2008. Comments are due March 25, 2008. http://www.state.tn.us/environment/apc/ppo/phmarch252008.pdf.