On April 5, 2007, Diane S. Katz, director of science, environment and technology policy for the Mackinac Center, was a guest on “The Greg Marshall Show” on WMKT in Traverse City. Katz discussed a recent ruling by the U.S. Supreme Court that directs the EPA to place more restrictive limits on so-called greenhouse gases. The interview is 25 minutes and 22 seconds long.