The global supply of oil is going to decline because we've used up a good deal of the easy-to-get oil. We're going to reach a point in the not-too-distant future when it is impossible to keep increasing the daily supply.

The global supply of oil is going to decline because we've used up a good deal of the easy-to-get oil. We're going to reach a point in the not-too-distant future when it is impossible to keep increasing the daily supply.