Speaking of urban tree coverage, Patrick Collison (CEO/Co-founder of Stripe) posted a graphic on X/Twitter showing tree coverage vs population density for a few large global cities.
source:
https://x.com/patrickc/status/2060853677611520510
Paris and London have very similar "tree cover" in the 75km dense population disk around the city. A lot of northern cities in the United States over perform in terms of tree coverage. The notable exception to this is Chicago.