World's busiest waterway, the Rhine River that runs through northern Europe, is in such bad shape ecologically that it ranks with Lake Erie as one of (...)

Original Toronto Star caption: World's busiest waterway; the Rhine River that runs through northern Europe; is in such bad shape ecologically that it ranks with Lake Erie as one of the world's most threatened bodies of water. But action on cleaning up the river is slow; especially in France where potassium mines dump thousands of tons of pollutants into the river.