Optimally you'd want very dense urban enviroment mostly if not all to make sure as much nature as possible can be untouched and thriving.

Just a heads up that the idea of nature = no humans, or rather, the divide between human spaces and "natural" spaces is also firmly rooted in white supremacy and colonial ways of looking at land and its role in production. Indigenous and global south people, even global north people in some cases have thrived in rural and wild environments while inhabiting them and participating in the biodiversity. The problem isn't people, it's extractivism. And if ecosystems will ever have a chance to recover it will be through regenerative and conscious practices, not by letting fields fallow and forests do their thing while humans live sequestered "outside" of nature.