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Five Billion Years of Energy Supply: the "Stereosphere" and the Upcoming Photovoltaic Revolution

Both the biosphere and the stereosphere use solar light as the energy potential necessary to keep the metabolic cycle going and they build-up metabolic structures using nutrients taken from the earth's surface environment.

Depletion is real, Depletion is now, and if a Jellyfish Stings you, you Know Why

The sea has been nearly emptied of fish, and that has generated a booming jellyfish population and of other invertebrates, such as crabs and lobsters whose numbers, once were kept in check by the fish.

Power is Nothing without Control: Lessons from the Failed Coup in Turkey

We seem to be facing the same problems that the Romans faced two thousand years ago: how to maintain control over a complex system that turns out to be unstable and prone to fighting against itself?

Would Robin Hood Help us Fight Climate Change?

Today, a lot of the world's monetary wealth is in the hands of a tiny group of super-rich people; the virtual equivalent of Scrooge McDuck's money bin.

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.

But What's the REAL Energy Return of Photovoltaic Energy?

According to a recent, comprehensive study of the scientific literature (1), the average energy return on energy invested (EROEI) of the most common photovoltaic technology (polycrystalline Si) is 11-12. A far cry from the legend of the "EROI smaller than one" that's making the rounds in the Web.

How Much for the Sustainable Energy Transition? A "Back of the Envelope" Calculation

"Back of the Envelope" calculations are a tradition in science and often turn out to be able to provide plenty of useful information, at the same time avoiding the common pitfall of complex models, that of being able to fit anything provided that one has enough adjustable parameters.

How the greatest technology ever developed backfired on us

Language is the real break of humans with everything else that walks, crawls, or flies on the earth...But, as for all technologies, it has unexpected consequences.

The Climate Emergency: Time to Switch to Panic Mode?

The latest temperature data have broken all records...

Living in Interesting Times: Have CO2 Emissions Peaked?

The projections that had been circulating during the past few months turned out to be correct. Now, it is official: the global carbon dioxide (CO2) emissions peaked in 2014 and went down in 2015. And this could be a momentous change.
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