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 | Class | Rank | Billions of U.S. dollars | Class | Rank | Value | Arctic Cordillera | Tundra | Taiga | Hudson Plain | Boreal forests | Northwestern forested mountains | Marine west coast forest | Eastern temperate forests | Great Plains | Deserts and steppes | Mediterranean California | Southern semi-arid highlands | Temperate sierras | Tropical wet forests | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1.96% | 6.84% | 22.1% | 11.9% | 32.1% | 29.3% | 5.59% | 34.8% | 38.2% | 26.9% | 39.7% | 6.89% | 11.3% | 14.5% | ||||||||||
0.16.0