In the new ecological age, we have learned that trees have far more value than providing timber: they keep soils moist, prevent floods and provide shelter, store carbon, beautify landscapes, protect water sources, increase biodiversity, improve conservation and induce wellbeing. We now know that we need trees, which is why countries across the world are planting trees by the millions. China has plans to plant forests the size of Ireland, Latin American countries have pledged to restore 20m hectares of degraded forest and African countries more than 100m hectares.