In Norway, the amount of roundwood cut has been less than the increment for many years. Intensive management of forest has been carried out with a view to high production of timber, along with extensive planting of trees. A degree of utilization of less than 100 per cent leads to an increase in the cubic mass of forest, implying that a steadily increasing amount of CO2 from the atmosphere is assimilated by trees. It is estimated that in 1994, the net amount of CO2 assimilated by forest was15 million tonnes, amounting to about 40 per cent of Norway's anthropogenic emissions of CO2.