Additional area needed for carbon storage in important
unprotected sites
We estimated how much additional area would be needed to
reach arbitrarily chosen global targets of securing 75 and
90% of total biomass carbon in natural habitats by selecting
the areas with the highest density of carbon until the targets
were met. To do this we excluded the current protected areas
and important sites for biodiversity (IBAs and KBAs) from
the global biomass layer and selected the sites with highest
carbon storage from the carbon layer until the targets
were met.