in progress… stay tuned…
EROI is Energy returned on Energy invested. In other words, EROI is the energy yield we get – our net return. Call it the ROI of energy. It is a distinct measure from energy efficiency as it does not measure the primary energy inputs to the system, only usable energy.
Here’s a simple hierarchy of EROI in our current infrastructure system. See any ‘issues’?
Figure:. “Pyramid of Energetic Needs” representing the minimum EROI required for conventional oil, at the well-head, to be able to perform various tasks required for civilization. The blue values are published values, the yellow values increasingly speculative. If the EROI of a fuel (say oil) is 1.1:1 then all you can do is pump it out of the ground and look at it. Each increment in EROI allows more and more work to be done. EROI chart from “EROI of Global Energy Resources Preliminary Status and Trends” Jessica Lambert, Charles Hall, Steve Balogh, Alex Poisson, and Ajay Gupta State University of New York, College of Environmental Science and Forestry ————————————————————————— EROI is one of the most important, unknown energy measurements.
from our crazy hi-tech world… another technology solution created by technology itself…
I noticed an immediate improvement in my sleep cycle once I installed ‘flux’ on all my e-devices. Let me explain…
Scientists and others have known for years that LEDs and screen pixels are rich in the blue spectrum. If you watch TV or work on your computer just before you want to sleep, you’ll have a more difficult time, because that blue light interferes with your circadian cycles.
During the day TV+ computer screens look good—they’re designed to look like the sun. But, at 9PM, 10PM, or 3AM, you probably shouldn’t be looking at the sun.
Here’s how to get it: “f.lux makes your computer screen look like the room you’re in, all the time. When the sun sets, it makes your computer look like your indoor lights. In the morning, it makes things look like sunlight again.” https://justgetflux.com/ Tell f.lux what kind of lighting you have, and where you live. Then forget about it. f.lux will do the rest, automatically. It’s available for Windows, Linux, Apple, Android, iphone, ipad
so simple… now if we could only do without all these e-toys?? nah….