[The effect of atmospheric pollution in the city of Srednogorie on the health of the population].

The town of Srednogorie is one of the ecologically endangered districts of Bulgaria because of environmental pollution by the copper works. The morbidity of the population is studied in relation to the atmospheric air pollution. Basic pollutants are: sulphuric compounds (sulphur dioxide and sulphuric acid) and to a lower rate--lead and arsenic. The tendencies of air pollution are favourable, save lead pollution, the concentration of which increases during the last years. The structure of the morbidity of the population point out that there is an increase of the relative part of diseases, which could be related to the systematic effect of heavy metals and arsenic (malignant neoplasms, diseases of the nervous and cardiovascular system, diseases of the kidney). More frequently are observed acute and chronic cases of diseases of the respiratory tract.