Thanks, Doug, for your persistence.
Please keep following it and let us know your conclusion. I still wonder
if "total costs" are being accounted for. "Production" does not include
everything. Transport, raw material gathering, disposal, installation,
maintenance, factory construction, etc. I guess, I'm not convinced yet. I
admit a personal bias; I have a hard time seeing anything past low tech and
simple processes with materials locally at hand as being sustainable. But
I hope that doesn't stop anyone from trying to convince me, that's just
where I'm coming from.
Eric