Yet many areas targeted by AFR100 erroneously mark Africa's open ecosystems  as degraded and suitable for afforestation  . These ecosystems are not degraded, they are ancient ecosystems that evolved in the presence of disturbances  . Afforestation prioritises carbon sequestration at the cost of biodiversity and other ecosystem services . Furthermore, it remains uncertain how much carbon can be sequestered as, compared to grassy ecosystems, afforestation can reduce belowground carbon stores and increase aboveground carbon loss to fire and drought . Thus, afforested areas may store less carbon than ecosystems they replace . Afforestation would reduce livestock forage, ecotourism potential and water availability , and may reduce albedo thereby increasing warming .
IPCC
Climate Change 2022: Impacts, Adaptation and Vulnerability
IPCC Report