Copper Energy Price Ratio 5,43 EUR/kg 48 MJ is about 0,50 EUR/kWh https://t.co/bz2oXsfjmS pic Extracted Ugo Bardi pic.twitter.com/mRSNtV8dJP
— thomas reis (@peakaustria) 17. September 2017
or Optimism about the depletion problem comes from a basic mistake – that of considering the amounts of minerals available and not the energy cost of recovering them.
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