From 1982 to 2016, how much of the world's net tree coverage was lost?
In 2018, the journal Nature published an analysis of "35 years' worth of satellite data" to "provide a comprehensive record of global land-change dynamics during the period 1982-2016." It found that "tree cover has increased by 2.24 million sq. km (+7.1% relative to the 1982 level)." The authors of the paper calculated with 90% confidence that their best estimate of +7.1% varies from +2.9% to +10.8%. Likewise, a 2016 paper in the journal Nature Climate Change found "a persistent and widespread increase" in "greening" or plant growth "over 25% to 50% of the global vegetated area" from 1982 to 2014, "whereas less than 4% of the globe" had less greening over this period. A major factor in this greening is higher levels of atmospheric carbon dioxide (CO2), which is a vital ingredient for plant photosynthesis.