Local restoration projects often target vegetated ecosystems like mangroves, seagrasses and salt marshes that are valued and used by coastal communities . Detail on mangroves and corals as EbA and protection/restoration hotspots is provided in SM3.8. Common and effective actions  include securing accommodation space , restoring hydrological  and sediment dynamics; managing harvesting ; reducing pollution  ; and replanting appropriate species in suitable environmental settings . Although efficacy is context dependent  and implementation is most often local , such projects facilitate tangible community engagement in climate action. Moreover, because these ecosystems sequester disproportionate amounts of carbon  , restoration supports climate-change mitigation . Yet, constraints remain. For instance, Southeast Asia has 1.21 million km2 of terrestrial, freshwater and mangrove area biophysically suitable for reforestation, which could mitigate 3.43 + 1.29 Pg CO2e yr-1 through 2030; however, reforestation is only feasible in a small fraction of this area  given financial, land-use and operational constraints . Nevertheless, the multiple benefits offered by ecosystem restoration will likely outweigh competing costs and increase its relevance as part of adaptation-strategy portfolios , national carbon-accounting systems and nationally determined contributions by parties to the Paris Agreement .
IPCC
Climate Change 2022: Impacts, Adaptation and Vulnerability
IPCC Report