There are diminishing returns with density and (transportation) energy use:
* https://www.grida.no/resources/5414
* https://transportgeography.org/contents/chapter4/environment...
IMHO getting to 50-75 inhabitants per hectare, which gives <15GJ/person/year (where most EU cities are at), is a good place to aim for. Once you're at 100ppl/ha then there's not much improvement going to 125, 200, or more.
There are diminishing returns with density and (transportation) energy use:
* https://www.grida.no/resources/5414
* https://transportgeography.org/contents/chapter4/environment...
IMHO getting to 50-75 inhabitants per hectare, which gives <15GJ/person/year (where most EU cities are at), is a good place to aim for. Once you're at 100ppl/ha then there's not much improvement going to 125, 200, or more.