More than one-third of known species around the globe are at risk of disappearing, according to a new assessment. On Monday, the International Union for Conservation of Nature (IUCN) updated its Red List of Threatened Species.

A review of 47,282 tree species by the International Union for Conservation of Nature found that more than one third are at risk of extinction

More than a third of the world’s tree species are at risk of extinction, according to findings by the International Union for Conservation of Nature. The group said that its first global assessment of trees determined that 38 percent of species are at risk of extinction.