That is a much tougher problem. Tougher because our everyday existence causes this pollution. Stan Hedeed, a biology professor at Xavier University, said solutions to point-source pollution, such as the liquid coal spill in Kentucky, are much easier to find. Accidents lead to investigations. Investigations often lead to regulation.
Regulation can offer a solution.
But fertilizers, hog waste, oil or dirt being washed into the river from rainfall is a very different problem, Mr. Hedeed said. The point-source issue is solvable. You can haul someone into court based on that type of problem. All of us. The amount of pollution in the river grew with the population along the river's shore.