The geography of African biomes is projected to shift due to changes in atmospheric CO2 concentrations and aridity . Grassland expansion into the desert, woody expansion into grasslands and forest expansion into savannas are projected for areas of reduced aridity, caused by reduced moisture stress from CO2 fertilisation under medium  and high  emissions scenarios . This greening trend may slow or reverse with continued temperature increase and/or in areas of increased aridity . The net impact of these effects on vegetation is highly uncertain . The maintenance or re- establishment of natural fire and large mammal herbivory processes can mitigate projected CO2 and climate-driven changes . Expansion of croplands and pastures will reduce ecosystem carbon storage in Africa, potentially
IPCC
Climate Change 2022: Impacts, Adaptation and Vulnerability
IPCC Report