The final presidential debate on October 15 will focus on domestic and economic policy. Ask moderator Bob Schieffer to grill the candidates on energy policy. Submit your peak oil questions to Denise Li, Senior Producer of Face the Nation, at dlf@cbsnews.com.

Here's a sample question: "In 2005, a DOE report warned of "extremely damaging" and "chaotic" impacts that will occur if the US does not immediately embark upon a "crash mobilization" to prepare for the peaking of world oil production. The GAO echoed this call for urgent action in a February, 2007 report. As President, what will you do to ensure that the U.S. economy continues to function in the face of a finite and increasingly expensive supply of oil?"