We have all learned how dangerous and harmful mercury exposure can be. Mercury has long been targeted by the Ann Arbor-based Ecology Center. In fact, it is celebrating the 20th Anniversary of the National Vehicle Switch Recovery Program it helped launch in 2006. This program was designed to remove mercury switches from vehicles before they were recycled, significantly reducing environmental contamination. WEMU's David Fair talked to the Ecology Center’s Jeff Gearhart about the program’s success and where we go from here.