Dec 05, 2005 — We're continuing our series, Ten Threats to the Great Lakes. One of the ongoing pollution problems facing the Great Lakes is air pollution that settles out into the lakes. Smokestack emissions and volatile chemicals don't all just float away. They enter the lakes' ecosystem. The Great Lakes Radio Consortium's Lester Graham reports on efforts to deal with one of the major pollutants that makes that transition from air pollution to water pollution.