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The only variation is that the vehicles setting up the impassable wall might change slightly...
the Washington minivan, and the Oregon semi pulling 3 trailers seemed to make a great team. A bonus was that I was driving all the way through Oregon into Washington with a 1 year old, a five year old, and a 89 year old grandma.
100 years ago and 50 years ago we hit several jackpots in the form of vast coal, oil and gas deposits.
These were so rich and large that energy virtually spewed out of them for next to no energy or financial investment.
But recently I have received this via email from Nate: Are we wrong to believe that ERo EI is a fundamentally important metric of energy acquisition or is it simply that the work done to date is not sufficiently rigorous or presented in a way that economists and policy makers can understand.
Which, when I am honest with myself is more about me being unable to handle Oregon, than all of them being slow pokes. I just can't take another minute of them on I-5.
The Energy Return on Energy Invested (ERo EI or EROI) of any energy gathering system is a measure of that system’s efficiency.
The Cheetah symbolises an energy system living on the edge.
I first came across the concept of Energy Return on Energy Invested (ERo EI) several years ago in Richard Heinberg’s book The Party’s Over .