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Engis
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==Pollution fatalities== {{Main|1930 Meuse Valley fog}} In late 1930 and early 1931, several thousand cases of acute pulmonary attacks occurred in the Meuse valley, centered on Engis, and 60 people died. A commission of inquiry set up by the Belgian government concluded that the cause was poisonous waste gases, primarily [[sulfur dioxide]], emitted by the many factories in the valley and the furnaces used by the population, in conjunction with unusual climatic conditions coupled with the unique topographic characteristics of the area.<ref>Mage, J., and Batta, G. Resultat de l'expertise judiciare sur la cause des accidents survenus dans la Vallee de la Meuse pendant les brouillards de decembre 1930. Chim. & Ind., 27, 145 E (1932).</ref><ref>Batta, G., Firket, J., and Leclerc, E.: Les problemes de pollution de l'atmosphere. G. Thone, Liege, 1933 (pp. 260-327).</ref> Others have claimed that the deaths were the result acute [[fluorine]] intoxication.
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