Up to half of world’s wild tree species could be at risk of extinction

Global study calls for urgent action to prevent ecosystem collapse, with farming the biggest cause of die-off

Between a third and half of the world's wild tree species are threatened with extinction, posing a risk of wider ecosystem collapse, the most comprehensive global stocktake to date warns.

Forest clearance for farming is by far the biggest cause of the die-off, according to the State of the World's Trees report, which was released on Wednesday along with a call for urgent action to reverse the decline.