Global conservation area coverage may be much closer to 30% than official counts suggest
Terrestrial conservation policy has been built around a deceptively simple number: how much land is protected. In 2022, governments committed under the Kunming-Montreal Global Biodiversity Framework to conserve at least 30% of the planet’s land by 2030, a goal often treated as a long road away from current progress. This analysis argues the road may already be shorter than global dashboards imply.
Using a globally representative sample that covered 10% of the terrestrial realm across 25 countries and territories, investigators combined international datasets with 65 national and subnational sources. The result was a broader accounting of conservation land than the official global database alone can provide. Extrapolated worldwide, the estimate places total terrestrial conservation coverage at 26.81% in 2022, not the 18.5% figure commonly cited in global discussions.
That is a major shift in framing. It suggests the world may be only about 3.2 percentage points shy of the 30% target, rather than more than 11 percentage points away.
National datasets reveal a large hidden layer of conservation land
The discrepancy comes from what global reporting systems capture and what they miss. Official coverage statistics draw primarily from the World Database on Protected and Conserved Areas, which has historically reflected state-governed protected areas most clearly and consistently. Many nationally recognized protected areas, and much of the emerging category of other effective area-based conservation measures, have not been fully incorporated into global totals.
This matters because conservation on the ground is often more diverse than the international record suggests. Some lands are governed by private actors, Indigenous Peoples or local communities. Others are managed under long-term stewardship regimes that contribute to in situ biodiversity conservation even when conservation is not their primary legal purpose. In the sampled countries and territories, these additional categories contributed substantially to the overall coverage estimate: 3.64% from nationally recognized protected areas and 7.38% from possible OECMs, alongside 15.79% in globally recognized protected areas.
The sample itself was not random in the casual sense; it was designed to be representative of major influences on conservation extent and biodiversity patterns. That design gives the estimate weight, because it was built to reflect global variation rather than simply averaging familiar national datasets.
The land is already protected in many places, but not evenly enough
A few numbers from the analysis land with force. Globally recognized protected area coverage in the sample reached 16.15%, closely tracking the official 15.79% figure and lending credibility to the method. From there, the broader extrapolation points to a large stock of conservation land that has not yet appeared in headline global metrics.
The biological meaning of that hidden layer is just as important as the arithmetic. The extra land does not repair the deeper weakness of present conservation networks: poor ecological representativeness. Coverage is concentrated unevenly across biomes, with polar and alpine systems receiving disproportionately high protection, partly because their economic opportunity costs are low. Tropical and subtropical forests, savannas and grasslands remain more unevenly covered, even though they hold much of the planet’s biodiversity and face intense pressure from land conversion.
One sentence captures the core problem.
Meeting a percentage target does not automatically conserve the ecosystems most in need.
Ecological integrity is high, but representativeness gaps remain
The study also compared the characteristics of the different conservation area types. Globally recognized protected areas, nationally recognized protected areas and possible OECMs all showed similarly high ecological integrity, with globally recognized protected areas having the highest proportion of ecologically intact land. In practical terms, this suggests the newly identified conservation land is not simply marginal or degraded space counted for convenience; much of it still retains substantial ecological value.
Agricultural suitability was low across the conservation categories overall, with only 2.5% of land in the three conservation area types classified as highly suitable for agriculture. Possible OECMs did contain more moderately suitable agricultural land than protected areas, which hints at a different conservation model: land where livelihoods and biodiversity coexist rather than land removed entirely from use. Some of these areas likely support low-level harvest, trade or local resource use while still maintaining important biodiversity values.
That nuance matters because global conservation policy often gets trapped in a false binary between strict exclusion and complete exploitation. This analysis shows a broader middle ground already exists in practice, and it may be central to how conservation expands without ignoring people on the land.
Why the target still falls short on biodiversity outcomes
A higher coverage estimate should not be mistaken for a solved problem. The authors make clear that even if the area component of Target 3 is nearly within reach, the remaining components are not automatically satisfied. The framework also calls for areas to be effectively managed, equitably governed, ecologically representative and well connected. Those demands are much harder to meet than a simple acreage count.
The paper’s strongest policy implication is not that the 30% goal is unnecessary. It is that the debate has been too focused on whether the world can hit the area number, and not focused enough on what kind of land gets counted. If current conservation networks remain fragmented and biased toward low-conflict or low-opportunity-cost areas, biodiversity loss will continue even when the headline percentage improves.
What the new estimate means for conservation planning
The estimate also changes the political geometry of the target. If countries are closer to 30% than expected, then the next phase of implementation should not be built around a panic to add raw hectares. It should be built around recognition, verification and better integration of the conservation sites that already exist but are missing from global records. Formal recognition of OECMs could be especially consequential, since many of these sites may already have the management structures and ecological qualities needed for international acknowledgment.
A second practical consequence follows directly from the results. Conservation finance cannot be spread only as a response to the coverage number; it has to be directed toward filling representativeness gaps, strengthening governance and improving connectivity. Otherwise, the world could congratulate itself on approaching a target while leaving the most vulnerable ecosystems underprotected.
The study closes that gap between counting and conserving. What it does not close is the harder gap between more land on paper and a truly representative, equitable and effective conservation network.