we shouldn't think of solving our environmental problems by reducing our tech level or returning to an earlier level of technology, and we absolutely can't think to localise everything, or worse build everything for the level of individual independent houses, with one family each
a lot of our older tech was very environmental damaging, even just herding goats can fuck up the environment if its not organised with protecting it in mind
currently tech mainly built and used for the purpose of generating profit, this has been the case for hundreds of years, there isn't a past form that didn't harm the envroment, even simple hunter-gatherer societies sent species extinct
the only solution is to repurpose what we already have for the benefit of all humanity, its not about how much tech we have its how its used