The author points at sulphur removal of waste gases and exhalates from anorganical industry and metallurgy. These are the areas where is the possibility of improvement of the air quality in ČSSR. From the analysis of the article follows that is necessary to prevent production of exhalates and in building of new plants ensure their minimization. By localization of the plant is necessary to take into consideration also the intensity of their devastation effect, especially with the regard to possibility of their dispersion and immission background.