The United States gets over half of its electricity from burning coal, and this tremendously important resource remains one of the nation's greatest assets. However, it is not an asset without problems, as the burning of coal has brought with it tremendous levels of air pollution and other problems. This latest radio documentary from the American RadioWorks group was produced by Catherine Winter, and it explores various aspects of coal production in the United States. The program also offers some historical perspective on the subject. The program can be listened to in its entirety here, or visitors can also download it for their own use. Along the way, visitors will hear from environmental history professor Joel Tarr, museum director Anne Madarasz, and smog museum director Don Pavelko.