HAY PETRÓLEO de sobras. Tranquilos:

The industry recovers an average of only one out of three barrels of conventional resources underground and considerably less for the unconventional.

This benchmark, established over the past century, is poised to change upward. Modern science and unfolding technologies will, in all likelihood, double recovery efficiencies. Even a 10% gain in extraction efficiency on a global scale will unlock 1.2 to 1.6 trillion barrels of extra resources -- an additional 50-year supply at current consumption rates.