Dataset created by the Food and Agriculture Organization (FAO) to
identify major global ecofloristic zones. It was used by the IPCC to
categorize carbon stock estimates. Each of the 20 ecoregions are
characterized by their temperature regime (tropical, subtropical,
temperate, boreal, and polar) and their vegetation type (humid forest,
dry forest, moist deciduous forest, shrubland, steppe, desert, etc.).