Can compound growth in energy use continue indefinitely?
Core argument: The author argues that sustaining the last 250 years' 2.3% compound growth in energy use for 450 more years would generate enough waste heat diffusion alone to boil the oceans.
Compound growth and long timescales do not go together. How about physics? Using energy of any kind means you have to diffuse the waste heat all energy produces, the “heat island” effect, if you will. This effect is currently dwarfed by the great effectiveness of carbon dioxide and methane as greenhouse gases – this year will be over 1.5°C above the old pre-industrial level and the warmest year ever – and that greenhouse effect represents 95% of the heating effect of human energy use, and the heat diffusion effect less than 5%. But if humanity were to keep up the last 250 years’ 2.3% compound growth in energy use for just 450 more years, the heat diffusion effect alone – this currently modest 5% – would be enough to boil the oceans! No, eternal growth will not work. The main point of my thesis is that whether measured GDP is slightly negative or positive is not the major issue. Overall, measured GDP is likely to shift over the rest of this century from growing, to flat, to slowly declining as labor forces shrink.



