Oil may save us in an unexpected way

The cheap oil that was easy to drill for is gone, the entirety of that resource of the entire planet squandered in a single lifetime. But, in a twist, the oil could save us yet.

As the shallow oil has been depleted, we have learned to drill deeper and deeper. This may lead to the ability to exploit geothermal resources.

http://www.scientificamerican.com/article.cfm?id=google-invests-in-geothermal