National parks and other protected areas which, in June 2021, covered 15.7% of global terrestrial area  contain ~90 GtC in vegetation and ~150 GtC in soil  and remove carbon from the atmosphere at a rate of ~0.5 Gt yr1  . The most strictly protected areas contain carbon at higher densities, but illegal deforestation and fires in some protected areas emit 38 + 17 Mt yr1 globally . In the Amazon, protected areas store more than half of the above-ground vegetation carbon stocks of the region, but account for only one-tenth of net emissions . Conservation of high biodiversity areas, particularly in protected areas, protects ecosystem carbon, prevents emissions to the atmosphere and reduces the magnitude of climate change .
IPCC
Climate Change 2022: Impacts, Adaptation and Vulnerability
IPCC Report