Which river is known for its flooding and pollution issues in Italy?

The Po River is known for its significant flooding and pollution issues in Italy. As the longest river in the country, it flows across northern Italy and is a crucial water source for a large portion of the population, as well as for agriculture. However, it has been plagued by environmental problems such as contamination from industrial waste and agricultural runoff. The river's watershed spans several regions where heavy rainfall can lead to rapid flooding, especially in areas where flood defenses may be inadequate. This combination of high pollutant levels and susceptibility to flooding has made the Po River a notable case in discussions about environmental management in Italy.

The other rivers listed do not share the same degree of notoriety concerning flooding and pollution specifically within Italy.