There are an estimated 60,000 tree species, around the world. Based on work being done by the Global Trees Campaign and IUCN Red List, approximately 8,000 of those, over 10% of the Earth’s total, are globally threatened with extinction. At least 77 tree species have become extinct in the past 100 years with many more no longer found in the wild. Since the latest assessment was completed in 2001, it’s very likely that these numbers will increase when the next update is released in 2020.