Why only reply to the comment about Kleingärten, is it because you realise you're wrong about what you said about only Europe having old cities? Which is actually a fairly comically cringe and ignorant comment to make? I live in Hamburg and it's relatively young at 1200 years old. There are lots of far older cities than that in Asia which apparently somehow have the luxury of space and being built from scratch (lol).
Cities are dense and cities are good for the environment. Your dream of everyone living in the middle of nowhere and driving everywhere in cars would be an ecological disaster, far worse than these shitty Kleingärten that should generally be got rid of anyway, since, there's nothing biodiverse about Kleingärten, they're just monocultures that are privately owned. If we careed about biodiversity then we would rewild them.
Cities are dense and cities are good for the environment. Your dream of everyone living in the middle of nowhere and driving everywhere in cars would be an ecological disaster, far worse than these shitty Kleingärten that should generally be got rid of anyway, since, there's nothing biodiverse about Kleingärten, they're just monocultures that are privately owned. If we careed about biodiversity then we would rewild them.