From the contents: Urban air quality (J. Fenger). - New directions: sustainability in strategic air quality planning (M.E. Chang). - Indoor air quality and health (A.P. Jones). - New directions: reducing the toxicity ofvehicle exhaust (R.L. Maynard). - The transport sector as a source of air pollution (R.N. Colvile et al.). - New Directions: Air pollution and road traffic in developing countries (A. Faiz, P.J. Sturm).