On the other hand: we have the oldest monitoring system in the world when it comes to measurement of stand volumes, growth and biomass production in our forests, the Norwegian National Forest Inventory, established in 1919. Since then the whole country has been assessed nine times (Statistikk fra Landsskogstakseringen 2013). In addition the bio-diversity and biotopes in forests have been monitored systematically since 2000, based on a set of manuals, specific methodologies and indicators. The aim is to present knowledge on biological conditions for use in the development of local forestry plans (Miljpregistrering i skog 2013).