A team of researchers, led by Ronald C. Estoque from the Center for Biodiversity and Climate Change, Forestry and Forest Products Research Institute (FFPRI) in Japan, have found that the global forest area has declined by 81.7 million hectares from 1960 to 2019, equivalent to an area of more than 10% of the entire Borneo Island, with gross forest loss (437.3 million hectares) outweighing gross forest gain (355.6 million hectares).