The world’s last remaining forest wildernesses are being damaged and destroyed by human activity at the shocking rate of 20,000 hectares—nearly 50,000 acres—per day, according to research findings announced Thursday.

Greenpeace, the University of Maryland, Transparent World, World Resources Institute, and World Wildlife Fund-Russia employed satellite imaging and mapping technology to chart out the global loss of Intact Forest Landscapes, which are unbroken areas of forest large enough to display biodiversity and bearing no damage from human logging, road construction, fossil fuel extraction, and more.

According to the groups, if something is not done to end the rate of destruction, these vital ecosystems could be wiped out completely before the end of next century.

The mapping done by the research found that a total area of IFLs three times the size of Germany was degraded between 2000 and 2013—amounting to over 8 percent of the world’s undisturbed forests.