They needn't be highrise towers, either. In large parts of many cities, just dropping single-family-only zoning and allowing for various midsize forms would do wonders.
Hell, just letting every street in America that has more than two lanes allow buildings of any height would do a lot more than people imagine, and it's pretty difficult to argue those type of roads as some hamlets away from civilization.
There's always room up, which is the issue in that most of American cities, it's illegal to build apartments in up to 80% of the area of the city.
They needn't be highrise towers, either. In large parts of many cities, just dropping single-family-only zoning and allowing for various midsize forms would do wonders.
Hell, just letting every street in America that has more than two lanes allow buildings of any height would do a lot more than people imagine, and it's pretty difficult to argue those type of roads as some hamlets away from civilization.