To paraphrase James Carville, "It's the people, stupid". It seems like there's a lot of Californians who talk about sustainability, but then turn right around and vote in people who continue to promote suburban sprawl, single family houses, zoning that doesn't promote density, and lack of investment in public transportation.
No offense, but your thinking here is actually a bigger part of the problem. There is nothing fundamentally unsustainable about suburbs, single family homes, low density, or cars. 50% of the USA is totally uninhabited, and it is possible today to build a totally off-grid and sustainable single family home / suburb in the majority of it. You can even capture carbon in concrete. Don't prescribe solutions just because y…
US suburbs are heavily subsidized with federal dollars[1], this is a huge reason why PGE can't effectively maintain the infrastructure in California. The ratepayers & tax base cannot afford to repipe a suburban neighborhood when the water service lines hit end of design life, let alone repaving, maintaining gas, electrical service, telecom & cable[2]. This is also why Fiber buildouts are so uncommon in suburbs (for-profit companies won't make their money back within a decade).
We have designed an extremely expensive mousetrap of suburbia where you get degrading public services (as maintenance & replacement bills accrue and go unmet), nearly mandatory car ownership, and higher rates of health problems caused by the poor design of these neighborhoods[3].
1 - https://www.theamericanconservative.com/urbs/we-have-always-...
2 - https://www.strongtowns.org/journal/2018/9/27/a-texas-sized-...
3 - https://www.webmd.com/women/news/20040927/suburbs-may-be-haz...