Tree Planting Can Raise Wildfire Risk 26%
A 67,248-patch study across temperate regions points to fire as a cost forest-based carbon plans must weigh.
Updated on Nov. 4, 2026 in Environmental
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A global study of 67,248 temperate landscape patches found that afforestation, the conversion of land into forest, was associated with a 26% increase in wildfire occurrence per hectare per year and a 23% increase in expected burned area when fires ignited, using satellite fire and land-cover records from 2001 to 2023. The findings are observational and correlational, reported as a published study rather than a shipped product or policy.
Why it matters
The results challenge the assumption that planting forests is a straightforward climate measure, since fire risk can offset the carbon storage plantations are meant to provide. As climate warming intensifies fire weather, the study suggests the wildfire side of forest-based carbon strategies deserves equal weight in planning.
The study drew on MODIS satellite land-cover and fire records covering 2001 to 2023, comparing fire occurrence before and after afforestation across 67,248 patches. Results varied sharply by forest type: conifer plantations saw the steepest rise, while broadleaf and mixed forests saw fire occurrence fall by 23%.
The details
Forest plantations alter the fuel conditions in which fires start and spread. Dense planted stands can create more continuous fuel, meaning flames have a clearer path from one patch of vegetation to the next. The effect depends on what is planted and where: conifer plantations in temperate zones and Mediterranean-type landscapes showed the largest increases, while broadleaf and mixed stands showed reductions.
Timeline
The satellite fire and land-cover monitoring window analyzed in the study ran from 2001 to 2023.
The Tech Race
Forest-based carbon strategies have been pursued largely on the assumption that planting trees is a net climate benefit. This study pushes that assumption into the wildfire question, testing how plantations change fire outcomes across temperate regions rather than in a single country.
The findings matter most to governments, foresters, and landowners weighing tree-planting programs in fire-prone regions, where fire outcomes may need to be modeled alongside carbon benefits. Availability of any policy or planning change is not announced, so timing remains uncertain.
The takeaway
Planting trees is not automatically a fire-safe climate measure, and wildfire risk should be factored into forest carbon planning. Watch for follow-on studies that test whether these patterns hold as fire weather intensifies over the coming decades.
Further reading
For broader context on how land-use choices shape fire behavior, see the Environmental section.
Source note: This article includes information reported by Earth.
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