Peak Oil: A Breakdown
by Steve Zweig
Is oil a limited resource?
Yes. Oil was produced from the remains of prehistoric animals. (That’s why it’s called a “fossil” fuel.) Specifically, most oil was produced from organisms which lived between 100 and 150 million years ago. Since there were only so many organisms living then, only so much oil could have been produced from them. Once it’s used up, there’s no more.
Are we going to run out of oil?
Maybe—some people say yes, some say no. And among those who feel we will run out one day, there is considerable difference of opinion about when. And “when” is the real question anyway; the sun will one day expand into a red giant and swallow Earth, but since that’s not for 5 billion years, nobody gets upset about it. Knowing when we may run out of oil is as important as knowing if it will happen at all.
Peak Oil Theory—A Primer
Peak oil refers to when oil production “maxes out”—when the world is producing the most oil per day that it ever will. After that, it’s all downhill, and oil production will decline. However, “downhill” is not the same as “over and done”—peak oil is not when oil is depleted or used up, but when we start pumping less out of the ground. There will still be oil for years after that, but a reduction in supply will increase cost.

M. King Hubbert, the father of Peak Oil theory. (image: laugalaekjarskoli.is)
Most studies or theories of peak oil are built on the work of Dr. M. King Hubbert, a geoscientist at Shell who did most of his work in the 1950s and ’60s. The Hubbert peak theory says that for any limited resource, production follows a more-or-less bell-shaped curve (see graph below), and further argues that:
- Production starts at zero—nobody knows the resource is there, or what to with it
- Production climbs, as people start extracting and using the resource
- Not all of a resource is equally easy to exploit—some is located in less accessible places or costs more to dig up; the “easy” or “cheap” material is taken first
- As the last of the easily available resource is mined, the peak or top of the bell is reached
- After that, as more difficult or expensive sources are tapped, production starts decreasing
- Eventually (in theory) all of a finite resource is used up and production goes back to zero
Hubbert felt that one day, oil production would peak and then decline. In fact, according to his work, we should be peaking more-or-less now, sometime around the early 2000’s.

The Hubbert Curve. (image: wikimedia.org)
Not everyone believes in peak oil. There are scientists and economists who think the theory doesn’t give enough weight to advances in technology that will increase oil supply and reduce demand. They also feel that the theory is too inflexible in its assumptions. For example, it assumes that the demand for oil remains constant or grows even as price increases, instead of assuming that supply, demand, and price affect each other in a constant feedback loop.


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