I will read Howard Odum, the concept of "emergy" is interesting. I've read about the concept of "exergy" as usable energy (50kcal in a liter of water have a dif

I will read Howard Odum, the concept of "emergy" is interesting. I've read about the concept of "exergy" as usable energy (50kcal in a liter of water have a different exergy than 50kcal in an olympic swimming pool), if i understand what you're saying, emergy is energy that came from outside our system, that can be used to reduce entropy? The approximation stopped to be true in 2005 for gaz and in 2006 for oil in western europe (EU + norway). The curve of oil consumption correlate heavily with PIB growth in Italy and Greece since 1980 and the change in energy consumption predated the change in production in these countries since 2006 (the energy crisis created a small production crisis 2 year before the subprime crisis in Italy and Greece). I think i saw the shell oil (+ Saudi arabia/russian attempt to break the market) correlate with growth in Europe around 2014 too, but i'm not sure if i can interpret those correctly. Anyway oil and gaz production seems to have reach a plateau in 2019 pre-covid. I was researching postkeynesian vision of economics for myself and pointless arguments with a friend, i'm pretty sure i found something even more depressing.