Net Energy Factor: Revision history

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9 January 2010

  • curprev 04:4704:47, 9 January 2010Mbauwens talk contribs 433 bytes +433 Created page with ' '''= the requirement that energy systems yield more energy than is invested in their construction and operation.''' [http://www.postcarbon.org/report/44377-searching-for-a-mirac...'