85. Perfect Storm gets nearer
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https://surplusenergyeconomics.wordpress.com/2017/01/09/85-perfect-storm-gets-nearer/
https://www.tullettprebon.com/Documents/strategyinsights/TPSI_009_Perfect_Storm_009.pdf
http://letthemconfectsweeterlies.blogspot.se/2017/08/renewableseroi-why-money-doesnt-cut-it.html