Sulphur trioxide as a pollutant

Nature 
Sulphur trioxide in solid, liquid or as a mist can cause severe damage to living tissue. Used in manufacturing of dyes, anhydrous nitric acid, and explosives and for sulphonation of organic acids. Exposure to sulphur trioxide, while normally confined to those working with it, can result in chronic respiratory tract damage, metabolic damage and acid burns.
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Value(s) 
Type 
(E) Emanations of other problems