The first systematic, quantitative appraisal of power density, offering detailed reviews of power densities of renewable energy flows, fossil fuels, and all common energy uses.There''s no author whose books I look forward to more than Vaclav Smil.Bill GatesIn this book, Vaclav Smil argues that power density is a key determinant of the nature and dynamics of energy systemsAny understanding of complex energy systems must rely on quantitative measures of many fundamental variables. Power densitythe rate of energy flux per unit of areais an important but largely overlooked measure. Smil provides the first systematic, quantitative appraisal of power density, offering detailed reviews of the power densities of renewable energy flows, fossil fuels, thermal electricity generation, and all common energy uses.Smil shows that careful quantification, critical appraisals, and revealing comparisons of power densities make possible a deeper understanding of the ways we harness, convert, and use