Physiological Density
WorldPopulationAgriculturePhysiological population density, or the number of persons per unit area of arable land, by country.
FAOA world map showing physiological density. Dark red (more than 2,500): Egypt, Yemen, South Korea, Greenland, Guinea. Red to light red (500 t0 2,500): China, Saudi Arabia, Mexico, India, Iran. Very light red (less than 500): Canada, U S A, Russia.
Class | Rank | People per square kilometer | Approximate Form and Extent of Outcrop of Carbonate Rocks | Value | Class | Rank | Metric tons | Lightning Frequency | <0.1 flashes/km²/year | 0.1 flashes/km²/year | 0.2 flashes/km²/year | 0.4 flashes/km²/year | 0.6 flashes/km²/year | 0.8 flashes/km²/year | 1 flash/km²/year | 2 flashes/km²/year | 4 flashes/km²/year | 6 flashes/km²/year | 8 flashes/km²/year | 10 flashes/km²/year | 20 flashes/km²/year | 30 flashes/km²/year | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 5.56% | 24.4% | 16.4% | 8.63% | 6.27% | 9.50% | 4.67% | 3.58% | 14.1% | 25.7% | 10.1% | 11.3% | 14.8% | 42.6% | 30.6% | 47.1% | ||||||||
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