Deforestation in Central Kalimantan, Indonesia. Jurnasyanto Sukarno / Greenpeace Schemes that certify wood or paper as sustainable are doing little to stem the loss of forests globally, a study finds. Under these programs, auditors assess forests, applying a stamp of approval to those that meet strict standards for sustainability. Their aim is to spur companies to source timber products only from certified areas, which comprise roughly 10 percent of forests globally.  But the schemes are voluntary, run not by governments but by independent groups such as the Forest Stewardship Council . And according to a study published in Communications Sustainability , they are doing little to help the cause of protecting forests.  Between 2013 and 2023, the world lost at least 50 million acres of forest each year, an area roughly the size of Nebraska, according to an analysis of satellite imagery. Some forests were lost to fire, others deliberately cleared by loggers, farmers, or developers.…