A groundbreaking map identifies 215 million hectares suited for natural forest regeneration in tropical regions, capable of sequestering 23.4 gigatons of carbon.
For decades, tree planting dominated forest restoration efforts worldwide, despite mounting evidence that a quieter, less expensive alternative often works better. Natural forest regeneration in tropical regions, allowing degraded land to recover on its own with minimal human intervention, frequently produces more biodiverse, resilient forests than plantation-style restoration under similar conditions. Until now, researchers lacked detailed, high-resolution data showing precisely where this natural recovery process holds the greatest promise.
A Nature Ecology and Evolution study closed that gap, producing the first model mapping natural forest regeneration potential in tropical regions across every tropical forested country and biome on Earth. Built on remote sensing analysis identifying actual patches of natural forest regrowth between 2000 and 2016, rather than relying on coarse estimates or expert guesswork as previous studies had, the map offers unprecedented precision for targeting restoration investment.
The results are striking. Researchers estimate 215 million hectares, an area larger than the entire country of Mexico, hold genuine potential for natural forest regeneration in tropical regions. Left to recover naturally over 30 years, this land could sequester an estimated 23.4 gigatons of above-ground carbon, roughly equivalent to more than two decades of current global emissions from fossil fuels and industry combined.
Five countries account for more than half of this global potential. Brazil leads with over 20% of total regeneration potential, followed by Indonesia at nearly 14%, then China, Mexico, and Colombia, rounding out the top five nations that collectively represent 52% of the opportunity worldwide. This concentration suggests that even modest policy shifts within a handful of countries could unlock outsized climate and biodiversity benefits.
What distinguishes natural forest regeneration in tropical regions from active planting is cost-effectiveness paired with ecological quality. Rather than purchasing seedlings, preparing sites, and maintaining plantations, natural regeneration often requires simply removing barriers preventing forest recovery, invasive species, unmanaged livestock grazing, or encroaching agriculture, then allowing existing seed banks, root systems, and nearby forest patches to do the rest. Research consistently shows this approach yields forests with greater species diversity and more resilient ecosystem function compared to plantation alternatives.
Integrating Indigenous knowledge and securing land rights within these territories increasingly stands out as essential to translating mapped potential into genuine forest recovery. Communities that have sustainably managed these landscapes for generations bring practical understanding of local conditions that purely technical restoration planning cannot replicate on its own.
Natural forest regeneration in tropical regions succeeds most reliably near existing forest patches and within territories managed by Indigenous Peoples, whose land stewardship researchers say is essential to translating mapped regeneration potential into genuine, lasting forest recovery. Photo by Bill Salazar on Pexels.
The map reveals fine-scale spatial variation researchers say is critical for effective planning. Regeneration potential clusters strongly near existing forest patches, since seed dispersal and ecological connectivity heavily influence whether cleared land can recover naturally. This granular detail lets governments and conservation organizations distinguish between land where natural forest regeneration in tropical regions will likely succeed unaided and land that requires more intensive intervention or active planting.
Beyond carbon sequestration, restoring tropical forests at this scale carries far-reaching consequences for biodiversity conservation, since tropical forests harbor a disproportionate share of Earth’s terrestrial species diversity. Millions of livelihoods across forested tropical nations also depend directly on healthy forest ecosystems for food, water regulation, and economic activity, so successful regeneration delivers benefits that extend well beyond atmospheric carbon accounting.
Researchers emphasize that the map is intended as a decision-support tool rather than a final policy prescription. Natural forest regeneration in tropical regions succeeds only when paired with appropriate governance structures, including payment-for-ecosystem-services schemes and stronger frameworks that compensate communities for environmental stewardship. The overlap between high-potential regeneration zones and Indigenous Peoples’ territories adds further complexity, since these communities often lack formal land recognition despite serving as effective forest stewards in practice.
As nations pursue ambitious global restoration commitments under frameworks addressing both climate change and biodiversity loss, this map offers something previously unavailable: precise, evidence-based guidance on where natural forest regeneration in tropical regions could deliver the greatest return on conservation investment. Rather than treating forest restoration as a uniform global strategy, the research points to a more targeted approach, one that recognizes that some degraded tropical land wants only the chance to heal itself, provided the barriers standing in its way are finally removed.
