Well, the idea of describing an entire scenario for a futuristic green utopia on a chat site is pretty "LOL" isn't it? (comment is NOT directed at Irish#1, as he asks questions reasonably and unemotionally.)
To Irish#1 then (as it is worth speaking to a good inquirer): the initial comment by Bluto involved imagining how a green society might be structured and would it help with things like this. That takes a lot of describing but here's a little of that.
Scientifically/physically: any society must be based upon a few fundamentals --- the most obvious being "energy sustainability", "materials sustainability," and "waste minimization." The so-called classic green utopia would be a society with technology that has solved those things.
"Energy sustainability": there are libraries full of information about how to build energy systems which are solar based (this includes wind power, and plant power, and wave power, but we can fudge in geothermal power in under the sustainability label even though it isn't sun-based and "reproducing".) If there are areas which can't provide ANY of these, then don't build your green utopia there.
Can we suddenly just explode out these technologies to handle living areas? If this is a farm, yes. If this is a small village, yes. If this is a large village or modest sized town, yes. If this is a middle-sized town --- not suddenly, but if we had pushed these technologies, absolutely. These technologies are scalable. The commentary was not "exactly RIGHT now" but could there be a green utopian society and what effects might it have.
Scientifically again: note that once the energy issue is solved, you can (if one has any imagination and cleverness) solve any MATERIALS problem as well. Immediately? No. With technology already in the laboratory? Yes. Why? How?
Societies that we're envisioning are trying to eliminate scarce ("expensive" and economically critical, and thereby world-destabilizing) both in the utopian and real world pragmatic design worlds. This is why material components from "growable" (think fancy plastics and composites) are being inserted into things everywhere they can be. Other expensive things are simply trying to be eliminated (companies using expensive fluids are trying to replace them with water based solvents; structural components with plastics even in things like airplanes.)
The tough nut to crack is the handle that metals have on the technosystems. Metals CAN be replaced in many more applications than presently scalable to macro-world function, but it's a tough go --- one solved temporarily by stock-piling critical resource amounts. But this hasn't kept science from picking away at it. Projects in labs worldwide are producing lab-bench electrical circuits using only organic polymers with no metals. Ready? No. Getting there? Yes.
You'd have to take several full courses in this stuff to see the big interlinked systemic picture fall into place. But you CAN see it. The point is that these systems are visualizable without pure inventive fantasy. They certainly have NOT been pushed by Big Business because it's easier making money the old linear (mine ---> metal, etc ---> use ---> waste ---> landfill) way {insert coal or oil after "mine" and air and water after "waste" if you wish.)
At the individual living level, societies based on these sustainable energy and materials systems have no limitations as to frontier research, connectivity via information rather than physical presence at great distance, sports and fun and booze and games etc.) If they WANTED to be Walden-like rural utopias, OK; their choice. If they wanted to be like Ernest Callenbach's ECOTOPIA, OK, that too.
The "isolation" in these systems is not isolation for isolation sake; it merely comes (mildly) with the tools which lead to sustainability. Once sustainability was secured, one might go visit grandma in Tokyo if you had to (traveling sensibly and rarely, if the technology was poor in energy and pollution burden), but in bad coronavirus times --- no go, and truly isolate, because you don't NEED those materials nor energy for your green utopia to function. "We" stay home with temporary closed ecotopian borders living just fine in our solar and plant-based high technology lives.
Did I answer the inquiry?Hell, no. VOLUMES have been written on this. I taught an entire college course on it, and even there could not cover nearly everything --- each senior student took ONE phase of the green society , and they/we still didn't have enough time.
I have only one gripe --- people who blurt out ignorant conclusions as if they know what they are talking about, when they haven't done any real study. There are many ways to ask a question. Probably none of them should include certain "tones." Irish#1 is a good patient and collegial question-asker. He's the sort of person that is worth some time typing all of this out, as he'll read it and think (even if he doesn't agree. ... and that's fine, too.)