Dave Steele spent 30 years as an employee of Shell Oil, having spent many years searching for hydrocarbon sources across the globe. He talks to us about the conventional ways of drilling for oil and the unconventional methods, which include hydraulic fracturing, or "fracking." Is there an advantage or disadvantage to each method? Plus, he explains why the price of oil is mostly driven by global politics, not by supply & demand.
Aired May 8, 2016