By compiling satellite data from 1991 to 2006, we found that 16 percent of the land has been improved, mainly in the dryland, and 35 percent has been degraded, mainly in tropical zones.
Sa pamamagitan ng pag-ipon ng satellite data 1991-2006, aming natagpuan na 16 porsyento ng lupa ay na-pinabuting, pangunahin sa dryland, at 35 porsiyento ay nagpapasama, higit sa lahat sa tropical zone.