Wealthy people have largely eliminated poor/middle class people out of the core urban areas, and moved them mostly to the suburbs/exurbs. Then, wealthy people tear down the functional public transportation between the urban city and the rest of the metro (mostly roads and freeways), and replace them with pretty but function-less "public transit" (mostly buses in the midwest).
This is sold, in theory, on being "green". But the new bus system covers less than 5% of the road system it replaces, and their gentrification efforts actually decrease the usefulness of the buses that already existed, since they cut down a small forests worth of trees on the edge of the city every time they displace an previously-urban neighborhood -- so the net result is almost always lower ridership - https://la.curbed.com/2019/5/22/18628524/metro-ridership-dow... - and their attempts to remove cars from the city (through intentional congestion, artificial scarcity, use fees, whatever) move this transportation to less efficient routes far outside the city, where they must burn more gasoline per person to accomplish identical trips, emitting more CO2 per person and in total.
So you get this ridiculous situation where US cities can point to all these shiny new bus lines and bike lanes as "progress", but absolutely no one can afford the housing needed to use any of that, so on a CO2-per-person basis, we've regressed significantly. And 1990's era cities with it's freeways and parking were often better for the environment on a CO2-per-person basis than 2019's cities are today that lack those.