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To truly understand the dynamics involved within the energy sector, the concept of "Power Density" and "EROEI" needs to be defined and understood. Power Density is the amount of Power (Time Rate of Energy Transfer) per unit volume. An Economic Concept of EROEI ( Energy Return on Energy Invested) is defined as the amount of energy spent on a project compared to the amount of energy produced by the project. 

Note: "Energy and Civilization a History", by Vaclav Smil is a great book to start with if you are looking for how our society got energy in the past and in the present.

Committee to Elect KENNETH YOUNG
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