Beyond the Age of Petroleum

Petroleum is, of course, a finite substance, and geologists have long warned of its ultimate disappearance. The extraction of oil, like that of other nonrenewable resources, will follow a parabolic curve over time. Production rises quickly at first and then gradually slows until approximately half the original supply has been exhausted; at that point, a peak in sustainable output is attained and production begins an irreversible decline until it becomes too expensive to lift what little remains. Most oil geologists believe we have already reached the midway point in the depletion of the world's original petroleum inheritance and so are nearing a peak in global output; the only real debate is over how close we have come to that point, with some experts claiming we are at the peak now and others saying it is still a few years or maybe a decade away.

Read at The Nation