The authors have investigated the issue of air pollution and its impact on people's health. The study touches such topics as the origins and types of pollutants, airspread contaminants, pollutants' biological effect and consequences on human health. Although pollution levels have recently shown to be lower, they still reflect a major concern for public health. Automobile traffic is the main responsible for air pollution and thin dusts are virtually the most dangerous particles in the atmosphere. Prevention will only be possible if governing bodies adopt effective strategies and public health agents develop adequate prevention plans.