If the population of Ludington had remained at 5 instead of 10,000 there would have been no sewage system emptying into Pere Marquette Lake. If the population of Ludington had remained at 5 there would have been no runoffs from landfills (one on Madison Ave. and one on Conrad Road, and one down on the Pentwater River that was supposed to have plastic liners used (ask former Acme Disposal employees about the plastic liners that were not installed) that used wetlands. If there had been no demand for Pelidow (Calcium Chloride snow melting pellets)from municipalites (population), there would have been no Dow Chemical Factory filling in the Pere Marquette Marsh. If there had been no population that resulted in industrialization that drove the demand for sand casting, there would have been no mining of the sand dunes around Ludington. If there had been no Dow, Harbonson-Walker, Ludington City, you could drink the water in Pere Marquette lake.
There is population however, and will always be. Nevertheless, the results of population should be mitigated and not allowed to destroy and pollute with the reckless abandoned that is/was evident at Ludington and other places.
As for pollution curing it self at Ludington, take a drive on U.S. 116 South and you will see that Dow Chemical is still dumping the grey sludge into its catch basin in what was the marsh. Also, go to where Washington Ave. and Sixth Street meet, and watch the Dow smoke stack spew out smoke despite the environmental laws requiring them to control the smoke. But, before you take any pictures, notice the sign that they have posted on the fence stating that it is against the law to take pictures without their permission(They got a court ruling that stated persons could not take pictures of their smoke pollution many years ago when someone flew over in a light aircraft and took pictures to prove that they were not in compliance with EPA laws.).
To the dip who stated that the pollution in Ludington cleans itself up, just prove it by going to Pere Marquette lake and drink a liter or so of the water.