BBC: More than half of all tree species in the Amazon face extinction, warn international scientists.
According to new data, up to 57% of all Amazonian trees may already fit the criteria of being globally threatened.
If confirmed, the estimates would raise the number of threatened plant species on Earth by almost a quarter.
Forest cover in the Amazon has been shrinking for decades, but little is known about the impact on individual plant species.
The trees at risk include iconic species like...