I don't know if there are any rivers going through major european cities that I would consider safe to swim in.
You have to understand that the current-day environmentalism is only a recent phenomena, while the waters have been getting polluted for centuries. It just takes lot of time and effort to turn that around.
You have to understand that the current-day environmentalism is only a recent phenomena, while the waters have been getting polluted for centuries. It just takes lot of time and effort to turn that around.