[Toxicologic and ecotoxicologic problems posed by air pollution in urban environments]

After defining the terms "toxic" and "ecotoxic", general notions are given on: 1) the main sources of urban pollution; 2) the main factors having an influence on qualitative and quantitative composition of urban pollution; 3) the main risks for man, urban ecosystems and physical environment (acute and long term noxious effects); the importance of interactions is stressed; 4) the general principles of prevention. A special chapter is devoted to "indoor pollution". Microbiological pollution is excluded.