Cultural burning is the intentional use of small, low-intensity fires by Indigenous peoples to maintain healthy landscapes, promote food sources, and sustain cultural traditions. It is not simply setting fire to clear land. It is a precise, knowledge-driven practice rooted in thousands of years of observation, passed down across generations, and tied to specific ecological and spiritual goals. As Frank Kanawha Lake, a research ecologist with the USDA Forest Service and a Karuk tribal member, describes it: fire is medicine, and cultural burning is about getting the right dose to maintain the productivity of an entire ecosystem.
Fire as Medicine, Not Just Management
The philosophy behind cultural burning starts with the idea that fire is a natural and necessary part of a healthy landscape. Indigenous communities across North America and Australia treat fire the way a doctor treats illness: applied carefully, at the right time, in the right amount, to produce a specific outcome. A burn might be designed to encourage the growth of plants used for food or basket weaving, to clear undergrowth so acorns are easier to collect, or to improve habitat for elk and deer.
The Karuk Tribe in the Klamath River Basin of northern California and southern Oregon provides one of the most well-documented examples. Karuk fire practices include frequent, low-intensity burns to restore grasslands for elk, maintain oak acorn groves, and produce straight hazel shoots used in basket weaving. Without fire, hazel grows in tangled, unusable forms. After a cultural burn, the shrub regrows with long, straight shoots ideal for weaving. Research by Lake confirmed through experimental burns that carefully timed fall fires do produce the best hazel shoots, validating what Karuk practitioners had known for centuries.
Smoke from these fires also served practical purposes: it kept weevils and moths from infesting stored acorns and drove away flies and mosquitoes. Every element of the burn had a reason behind it.
How Cultural Burns Differ From Prescribed Burns
On the surface, cultural burns look similar to the prescribed burns that government land managers use today. Both involve lighting controlled fires under specific conditions. The differences run deeper than technique.
Prescribed burns are typically planned around a single objective, often reducing fuel loads to lower wildfire risk. Cultural burns pursue multiple goals at once: ecological health, food production, materials for tools and clothing, ceremony, and community well-being. They are also guided by a different kind of knowledge. Rather than relying primarily on weather forecasts and fuel moisture meters, cultural burn practitioners pay close attention to phenology, the timing of seasonal biological events like plant flowering, insect emergence, and animal migration. They choose the most favorable time of year and time of day, use natural firebreaks, and avoid heavy machinery.
The scale and intensity also differ significantly. A study published in Forest Ecology and Management compared fuel consumption across three fire types in Australian eucalypt forests. Cultural burns consumed about 12.8 tonnes of fuel per hectare, roughly 13% of what was on the ground before the fire. Hazard reduction burns (the government equivalent of prescribed burns) consumed 75.7 tonnes per hectare, about 27%. Wildfires consumed 123.5 tonnes per hectare, or 38%. Cultural burns, in other words, are gentler by a wide margin, removing fine litter and undergrowth while leaving larger trees and deeper soil layers largely intact.
Why Burning Less Intensely Matters for Carbon
The intensity of a fire directly determines how much carbon dioxide it releases. Research from Cape York in northern Australia found that late-season fires, which burn through dried-out vegetation and higher fuel loads, release about twice as much carbon dioxide as early-season cool burns. Cultural burns are typically conducted during cooler conditions with higher moisture levels, keeping flames low and reducing emissions.
This creates a compounding benefit. By burning small areas regularly at low intensity, cultural fire prevents the buildup of fuel that feeds catastrophic wildfires. Those catastrophic fires don’t just release massive amounts of carbon. They destroy the large trees and deep root systems that store carbon over decades, setting back the landscape’s ability to pull carbon from the atmosphere. Regular cultural burning keeps the system in balance: less fuel accumulates, fires stay small, and the forest retains its carbon-storing capacity.
Creating Habitat Mosaics
One of the most visible effects of cultural burning is the creation of what ecologists call habitat mosaics. By burning patches of land at different times, practitioners open gaps in the forest canopy. Sunlight reaches the forest floor in those gaps, allowing understory plants to grow: berry bushes, grasses, wildflowers, and other species that need light. Adjacent unburned patches remain shaded and dense.
The result is a patchwork of different habitats across a small area, each at a different stage of regrowth. This variety supports far more species than a uniformly dense forest. Wildlife finds forage in the open patches and shelter in the dense ones. For tribes, these mosaics were essentially managed food systems, producing rich sprouts, fruit, seeds, nuts, and attracting the game animals that depended on them. Research conducted in partnership with the Karuk Tribe has shown that decades of fire suppression transformed these diverse landscapes from food pantries into food deserts.
Why Cultural Burning Was Suppressed
For most of the 20th century, federal and state governments in the United States and colonial governments in Australia actively prohibited Indigenous burning. Fire suppression became official policy, and Indigenous people who continued to burn faced legal consequences. The displacement of tribes from their traditional lands, particularly in regions like the Klamath Basin, physically separated communities from the landscapes they had managed for millennia.
The consequences accumulated over decades. Without regular low-intensity fire, forests became overstocked with dense undergrowth and dead material. Canopies closed in. The fuel loads that cultural burning had kept in check grew heavier each year. When wildfires eventually ignited in these fuel-rich landscapes, they burned with an intensity that the ecosystem had rarely experienced under Indigenous management.
Legal Barriers That Remain
Even as scientific understanding of cultural burning has grown, legal obstacles continue to limit its practice. One of the most significant barriers in the United States is the Clean Air Act. The law regulates air quality and holds states accountable for smoke emissions. Because cultural burns produce smoke, they can push air quality readings above federal thresholds, creating regulatory problems for the communities and agencies involved.
A 2025 analysis in the Georgetown Environmental Law Review examined this tension directly, using the Klamath region as a case study. The paper found that current regulations create a perverse incentive: they discourage the small, controlled burns that reduce wildfire risk while failing to account for the far greater emissions produced by the catastrophic wildfires that result from not burning. The authors recommended that Congress redefine “exceptional events” under the Clean Air Act to account for prescribed and cultural burns, and urged the EPA to publish clearer guidance that reflects current science on emissions from both controlled burns and wildfires.
Where Cultural Burning Is Happening Now
Despite regulatory challenges, cultural burning programs are expanding. The Karuk Tribe’s climate adaptation plan is one of the most comprehensive efforts in North America. It uses 23 cultural indicators across seven habitat management zones to guide fire decisions, and it calls for Indigenous burning methods as a climate adaptation strategy. The plan includes provisions for using fire to cool streams that have become dangerously hot for salmon, and even dedicates a chapter to using prescribed fire to protect electrical infrastructure as an alternative to the power shutoffs that utilities impose during high fire-risk periods.
In Australia, Aboriginal communities are leading similar efforts. The Bega Local Aboriginal Land Council launched a cultural burning program in 2017 at Tathra West in New South Wales. Across northern Australia, Indigenous ranger programs conduct early-season burns on vast stretches of savanna, reducing fuel loads before the hot, dry months arrive.
These programs are not just environmental projects. They are acts of cultural revitalization. Bill Tripp, Deputy Director of Eco-Cultural Revitalization for the Karuk Tribe, frames the work as restoring a relationship between people and land that colonization disrupted. For communities that define their identity through land stewardship, burning is not optional. There is, as Lake puts it, a sense of intergenerational responsibility to do it.