Clean air issues were discussed at length in the 107th Congress, but legislation was not enacted, leaving the same issues for possible consideration in the 108th. The most prominent air quality issues discussed in this report are; the controversy over EPA’s proposed changes to the New Source Review (NSR) requirements, Clear Skies / Multi-Pollutant Legislation, gasoline additive MTBE, Conformity of Transportation Plans and SIPs Deadlines for Achieving the Ozone Air Quality Standard.