Woods and forests are the “keepers” of the planet. They provide oxygen, food, water, counteract the advance of the desert, are the antidote to soil erosion. They capture and retain pollutants: trees alone have the potential to absorb about a tenth of global carbon emissions. In the trunk, in the roots, in the soil. They store it, acting as a natural deposit. A hectare of forest can sequester up to 5 tons of CO2 per year.