Assertion: grassland's area | /r/HasProperty | estimated at 52.5 million square kilometres
Facets:
value: based on igbp data
type: OTHER
Source sentences:
text: Grasslands in the wider sense are among the largest ecosystems in the world (Figure 1.1); their area is estimated at 52.5 million square kilometres, or 40.5 percent of the terrestrial area excluding Greenland and Antarctica (World Resources Institute, 2000, based on IGBP data).