Although these are crude
estimates they nevertheless illustrate the magnitude of the
additional area required to attain an ambitious target of
carbon storage in natural terrestrial habitats. The conversion
of unprotected ecosystems with high carbon storage
would exacerbate CO2 emissions, and therefore efforts to
mitigate climate change would need to ensure higher carbon
storage. For example, adding the extra 14.3% of land
required to reach the target of storing 90% of biomass
carbon in natural habitats would secure c. 246 Pg C