With world oil production about to peak and inexorably head toward steep decline, what fuels are available to meet rising global energy demands? That question, once thought to address a fairly remote contingency, has become ever more urgent, as a spate of books has drawn increased public attention to the imminent exhaustion of the economically vital world oil reserves. Kenneth S. Deffeyes, a geologist who was among the first to warn of the coming...

Kenneth S. Deffeyes is professor emeritus at Princeton University. Prior to teaching, he worked alongside M. King Hubbert at the Shell Oil research laboratory in Houston. As debates about the effects of fossil fuels on our climate and foreign policy intensify, the question of just how much longer we can depend on this finite source of energy becomes more and more pressing. This selection from Hubbert's Peak, the leading book on the limits of our...