An Urban_unit is an area that should always be keeping up with various urban infrastructure needs.
https://en.wikipedia.org/wiki/Functional_urban_area
https://en.wikipedia.org/wiki/Urban_unit#French_urban_units_with_over_200,000_inhabitants
https://en.wikipedia.org/wiki/Functional_urban_area#List_of_functional_urban_areas_by_population
https://en.wikipedia.org/wiki/List_of_metropolitan_areas_in_Europe#Metropolitan_areas
https://en.wikipedia.org/wiki/United_Kingdom#Demographics
https://en.wikipedia.org/wiki/Germany#Demographics
https://en.wikipedia.org/wiki/List_of_largest_cities#List
Canada has less than 1% of the worlds population. BC has less people than Switzerland. Yet, the area of Switzerland can fit into BC 23 times.
https://en.wikipedia.org/wiki/List_of_metropolitan_areas_in_British_Columbia#Metropolitan_areas