摘要：The CS gas has repeatedly been used as a tear gas by police forces during manifestations and riots, in Europe, in the United States and elsewhere. Our study is aimed to examine toxicity and health effects on humans of CS gas, following the people exposure to CS gas in Valsusa (Italy), during the 2011-2015 period. The claims that the CS gas is not toxic are counterbalanced by many findings by recent studies, showing many toxic effects, especially in case of misuse of the gas, or in weak and sensitive subjects. Adoption of the precaution principle seems, in this case, recommendable. The use of CS gas by police forces for riot control should therefore be abandoned, substituted by other countermeasures.
