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Olduvai III: Catacylsm
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Stereocene: The Future of  Earth’s Ecosystem

Stereocene: The Future of  Earth’s Ecosystem During the “golden age” of science fiction, a popular theme was that of silicon-based life. Above, you can see a depiction of a silicon creature described by Stanley Weinbaum in his “A Martian Odyssey” of 1934. The creature was endowed with a metabolism that would make it “breathe” metallic […]

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Negative energy return of solar PV in Northern Europe

Negative energy return of solar PV in Northern Europe Preface.  I once yanked this paper after huge blow back, but in the past few years, I have no reason to doubt Ferroni and Hopkirks methods, boundaries, or conclusions, so I’m putting this post back. An ERoEI of less than 1 means there is a net […]

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EROEI Calculations for Solar PV Are Misleading

EROEI Calculations for Solar PV Are Misleading The Energy Returned on Energy Invested (EROEI) concept is very frequently used in energy studies. In fact, many readers seem to think, “Of course, EROEI is what we should be looking at when comparing different types of energy. What else is important?” Unfortunately, the closer to the discussions of […]

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The real EROI of photovoltaic systems: professor Hall weighs in.

The real EROI of photovoltaic systems: professor Hall weighs in. The EROI of our various energy options, and its associated issues, may be the most important issues that will face future civilizations.  The present discussion tends to vacillate between people who accept (or advocate) very high EROIs for solar vs people who accept (or advocate) […]

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Olduvai IV: Courage
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Olduvai II: Exodus
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