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During the process of oxidation in the atmosphere this gas forms sulphates or salts that can be transported in the breathable particulate material (PM10) that in presence of humidity forms acids. Later these acids are an important part of the secondary particulate material or finest particulate material (PM2,5).The exposure to sulphates and the exposure to acids derived from SO2 is extremely risky for people's health because these compounds enter the circulatory system directly through the airways.he air pollution by SO2 has the following effects on human beings: 1  Corneal haze. 2  Breathing difficulty. 3  Airways inflammation. 4  Eye irritation. 5  Psychic alterations. 6  Pulmonary oedema.
TOMS Images from El Chichon and Mt. Pinatubo. This composite shows false-color images of the SO2 clouds on the second day after each eruption. Following the devastating eruption of Mt. Pinatubo in the Philippines in June 1991 there has been a resurgence of interest in the global effects of volcanism.Mt. Pinatubo was the second largest eruption of this century and produced approxmately 10 cubic kilometers of rock and ash (called tephra by volcanologists).OMS Images from El Chichon and Mt. Pinatubo. This composite shows false-color images of the SO2 clouds on the second day after each eruption. Following the devastating eruption of Mt. Pinatubo in the Philippines in June 1991 there has been a resurgence of interest in the global effects of volcanism.