A world map shows high (dark blue) urban population in America, Australia, parts of the Middle East, Southeast Asia; moderate (blue) in parts of Africa, Asia, and Eastern Europe; low (light blue) in Central/South Asia, and Sub-Saharan Africa.
Class | Rank | Percent | Major Iron-Producing Areas in North America | High | Regina | Houston | Philadelphia | Oklahoma City | San Antonio | Boulder | Wichita | Portland | Irvine | Minneapolis | Boise | Winnipeg | Spring Hill | Greeley | St. Louis | Detroit | West Palm Beach | Columbus | Augusta | McAllen | Topeka | Las Cruces | Bakersfield | Oceanside | Reno | Indianapolis | Stockton | Baton Rouge | Glendale | Salinas | Trenton | Aurora | Modesto | Nogales | Rock Island | Fresno | Covington | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2.52% | 1 | 1 | 1 | 1 | ||||||||||||||||||||||||||||||||||||||
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