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In order to get rid of the besiegers, the Rotenburgers poured liquid manure into the drinking water well. The besiegers withdrew and Rotenburg was saved. The story happened in the Middle Ages. But now it's red hot again. Water pollution is progressing inexorably. Rotenburg needs help from you and your team! You have 60 minutes to solve the mystery of water pollution. If you don't make it, thousands of people will die.