Four out of five trees in Germany are showing signs of sickness and many spruce forests have already died. Drought and climate change are to blame, so what can be done? Show more
Discover 11,128,835 listings and 277,865 playable programmes from the BBC
Four out of five trees in Germany are showing signs of sickness and many spruce forests have already died. Drought and climate change are to blame, so what can be done? Show more