By MEGAN McDONNELL
Capital News Service
LANSING — The St. Clair River that connects Lake Huron with Lake St. Clair has a long history of environmental problems that continues today, despite serious attempts to solve them. They are challenges as diverse as E. coli bacteria that shut down beaches, industrial pollution by PCBs (polychlorinated biphenyls) and mercury contamination so severe that residents are advised to limit their consumption of locally caught fish. Cleanup and sediment remediation projects have improved the river recently and it is beginning to flourish once again.