Answer to Question 1
Title I: Urban Air Quality
Establishes five classes for noncompliance with ambient air quality standards: marginal, moderate, serious, severe, and extreme.
Title II: Mobile Sources
Increases the emission standards for automobiles in two steps (1998 and 2003). Also requires the sale of reformulated gasoline in selected high-pollution cities.
Title III: Hazardous Air Pollutants
Requires EPA to use maximum control technologies to regulate the use of 189 toxic substances.
Title IV: Acid Rain Control
Allows EPA to issue acid rain allowances to existing companies. Allowances can be used, saved, or sold to other companies.
Title V: Permits
Requires major pollution emitters to obtain a special permit. Contains provisions that allow concerned citizens to petition for the revocation of a company's permit.
Title VI: Stratospheric Ozone Provisions
Bans the manufacture of methyl chloroform. The manufactures of the five most ozone-destructive chemicals were phased out completely effective in the year 2000.
Title VII: Enforcement
Increases the ability of EPA and corresponding state agencies to impose both criminal and civil penalties against violators of the Clean Air Act.
Answer to Question 2
The Clean Air Act contains provisions that require companies to take whatever actions are necessary to prevent or minimize the potential consequences of the accidental release of pollutants into the air. It also established an independent chemical safety and hazard investigation board to investigate accidental releases of pollutants that result in death, serious injury, or substantial property damage.