Still, since EROEI is the most important energy issue there is at present, and not the price of oil or some new gas find or a set of windmills or solar panels or thorium, it can’t hurt to repeat it once again, in someone else’s words and from someone else’s angle. This one comes from Brian Davey on his site CredoEconomics, part of his book “Credo”.
It can’t hurt to repeat it because not nearly enough people understand that in the end everything, the survival of our world, our way of life, is all about the ‘quality’ of energy, about what we get in return when we drill and pump and build infrastructure, what remains when we subtract all the energy used to ‘generate’ energy, from (or at) the bottom line.
Anno 2017, our overall ‘net energy’ is nowhere near where it was for the first 100 years or so after we started using oil. And there’s no energy source that comes close to -conventional- oil (and gas) when it comes to what we are left with once our efforts are discounted, in calories or Joules.
The upshot of this is that even if we can ‘gain’ 10 times more than we put in, in energy terms, that won’t save our complex societies. To achieve that, we would need at least a 15:1 ratio, a number straight from our friend Charlie Hall, which is probably still quite optimistic. And we simply don’t have it. Not anymore.
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