Old Forests Store More Carbon Than We Thought
People love planting trees after destroying forests.
It is one of the great modern rituals of environmental nonsense. Cut down a living system that took centuries to build, flatten the soil, remove the deadwood, erase the habitat, disturb the microbes, sell the timber, then tell everyone not to worry because some saplings have been planted somewhere else. That is not restoration.
A new study in Science makes the point with numbers. Researchers comparing primary and managed secondary boreal forests in Sweden found that primary forests store around 72% more carbon than managed secondary forests. Not just in the obvious places. Not just in trunks. In vegetation, deadwood, harvested wood products and, most importantly, soil.
Soils were both the largest carbon store and the biggest difference between primary and managed forests.
A forest is not a collection of vertical planks waiting to become furniture. It is a living carbon system. Trees, roots, fungi, deadwood, leaves, bark, soil, microbes, water and time all matter. You cannot clearcut that and replace it with a plantation like nothing happened.
The same study found that the carbon cost of turning primary forests into managed secondary forests may be 2.7 to 8 times higher than previous estimates. In other words, the damage has probably been understated for years. Convenient.
Forestry, agriculture and climate politics all love the same trick: destroy something complex, replace it with something simplified, then call the simplified version a solution.
We do it with forests.
We do it with soil.
We do it with animals.
A forest is not “tree cover”. That phrase already hides too much. A young plantation and an old forest may both appear green from a distance, but one is a living archive and the other is often a crop. Old forests hold carbon in bodies, roots, deadwood and soil. They also hold relationships. Relationships we barely understand.
Another 2026 Science study found that tree bark itself hosts vast microbial communities. Bark can hold trillions of microbial cells per square metre. These microbes can consume methane, hydrogen and carbon monoxide under certain conditions, and can influence climate-active gas fluxes. Even the surface of a tree is doing work most people never think about. So when industries talk about trees as “resources”, they are not just being cold. They are being ignorant. They reduce a living system into a unit of extraction.
This is what commodification does. It takes someone, or something alive, or some web of life, and forces it into a spreadsheet. Timber value. Carbon value. Offset value. Land value. Productivity. Anything except inherent value.
The world has already lost around one-third of its forests since the end of the last ice age. Half of that loss happened in the last century alone. People like to imagine the human footprint as cities, roads and tower blocks, but urban land takes up around 1% of habitable land.
The real land story is food.
Agriculture drives almost 90% of global deforestation, according to the FAO. More than half of forest loss comes from conversion to cropland. Livestock grazing is responsible for almost 40%. In South America, almost three quarters of deforestation is due to livestock grazing.
This is land being taken for crops and grazing. A huge amount of that land exists because humans keep breeding animals into existence to use their bodies, secretions and reproductive systems. 80% of agricultural land is used for livestock, while only 20% is used for crops for human food and industrial crops.
The thing people defend as normal is one of the biggest land grabs on Earth. And then, after forests are cleared, soils are depleted, carbon is released, animals are bred, confined and killed, and ecosystems are simplified into production units, the same systems offer us carbon offsets.
Soil carbon offset markets are another version of the same delusion. Soil carbon is not fossil carbon. Fossil carbon left underground is inert over geological time. Soil carbon is dynamic. It moves through living systems. It can persist for days, decades or centuries, depending on conditions, but it is not a moral permission slip for continued emissions.
Restoring soil carbon is necessary. Using it to excuse ongoing pollution is fraud dressed as climate policy.
There is already a soil carbon debt from agriculture and land-use change. There are ongoing emissions from machinery, fertilisers, manure and livestock. There is also the carbon opportunity cost of keeping land in production when it could be restored. Livestock production alone carries a vast opportunity cost because land used for grazing and feed is land not recovering into richer ecosystems. You do not repay a debt by using the repayment as permission to keep stealing.
This is the central lie behind so much climate greenwashing. Planting trees does not justify destroying forests. Soil restoration does not justify fossil fuel emissions. “Sustainable” forestry does not replace primary forests. “Efficient” animal agriculture does not erase the land it occupies.
The climate crisis is not just a technical problem. It is a moral problem caused by treating the living world as property.
Forests become timber.
Soil becomes an offset.
Animals become products.
Land becomes a production zone.
Then everyone acts surprised when the systems that hold life together start collapsing. Protecting old forests is not sentimental. It is rational. Moving away from land-intensive animal use is not extreme. It is obvious. Refusing to let corporations buy indulgences through carbon markets is not unrealistic. It is basic accountability.
A forest is not a carbon spreadsheet. It is not a timber bank. It is not a future offset. It is a living system built over time. And once it is gone, a row of saplings is not an apology.