We’re not running out of oil, but we may be running out of the oil in easy-to-reach places. That’s because oil doesn’t sit in a big pool just below the surface — it’s always been hard to reach, but the more we use, the harder it’s getting. In this second podcast in a series on oil, gas and coal, we continue to learn about some of the hard realities facing us as we deal with the energy sources we will all depend on for the foreseeable future.