I found this very interesting article on "Le Monde"'s website: Les arbres de Verdun, déplacés pour le climat For those who don't read French, here is a link to an online translation: Les arbres de Verdun, déplacés pour le climat Basically: it takes generations for trees to adapt to climate change, but the pace is now very quick and scientists fear that some species won't have time to adapt to a warmer, drier climate. So they're taking oak and beech seedlings from the south of France where the same species have developped genetic characteristics that allow them to adapt to the climate conditions that many think will prevail in the north of France in a few decades.