Uno studio svolto analizzando le acque fognarie di 42 città europee mostra quanta droga viene consumata, dove e quando. Quattro città svizzere fanno parte della lista. Zurigo si è classificata al terzo rango con 1,6 kg consumati quotidianamente, alle spalle della leader Amsterdam ed Anversa. Basilea, Ginevra e San Gallo si posizionano rispettivamente al nono, decimo e dodicesimo posto. La capitale è quindicesima ed è l’unica in cui il consumo è inferiore alla media europea.
Dall'inchiesta non emerge se l’elevata concentrazione di cocaina nelle città confederate dipende da un grande numero di consumatori, da un elevato consumo pro capite o dalla grande purezza dello stupefacente sul mercato svizzero.
ATS/Gila
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