Comment Re:11 years or 100 years (Score 3, Insightful) 154
Huge difference between looking at estimated recoverable vs. estimated total quantity. Just because we know an energy source exists doesn't mean it will ever be worthwhile to spend the energy required to recover it. eg, Helium-3.
Shall beds are geographically huge, but note how they have so far only been drilled in the thickest portions and only the shallowest formations have been actively pursued (marcellus vs. utica). It takes a lot of energy to get a gas well to produce, sometimes more than it will ever be capable of producing.