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Technology Breakthroughs Are Unlocking Geothermal Energy's Vast Potential Across The Globe
(www.renewableenergymagazine.com)
Technology for a Solar-Punk future.
Airships and hydroponic farms...
No, what I meant is that it is different if you build a system for selling electricity or if you build one for your own consumption. In the latter case other financial and practical considerations apply and rooftop solar can be cost competitive compared to buying electricity from a supplier.