Trail Mail: Deforestation Isn’t Just a Loss. It’s a Leak.

Real questions. Field-tested answers.

Got something on your mind? Ask away — your friendly Camp Counselor is in.

Dear Field Trip,

I always thought the reason deforestation was bad for the climate was that we need trees to absorb carbon dioxide. But I recently heard that cutting down forests can actually release greenhouse gases too. Is that true? —Stumped

Camp Counselor Says:

Yes, it's true. This is one of those climate facts that feels like it should have been explained to all of us much sooner.

Most of us were taught the simple version: trees are good because they “breathe in” carbon dioxide and give us oxygen. But forests are not just carbon vacuums. They are carbon storage units.

A living forest holds carbon in tree trunks, branches, leaves, roots, fallen wood, leaf litter, and soil. So when a forest is cut, burned, bulldozed, drained, or converted into roads, buildings, or farmland, we do not simply lose future carbon absorption. We can also release some of the carbon that was already stored there.

That is the part a lot of us weren’t taught.

Deforestation is not just a loss. It is a leak.

Think of a forest like a savings account for carbon. Every year, trees make deposits by pulling carbon dioxide from the air and storing carbon in wood, roots, and soil. When we clear a forest, we stop future deposits. But depending on what happens next, we may also start withdrawing from the account.

If trees are burned, carbon is released quickly. If they are left to rot, carbon is released more slowly. If the soil is dug up, dried out, compacted, or degraded, carbon stored underground can also escape back into the atmosphere. Some carbon can remain locked away longer in wood products, especially in buildings and furniture, but a lot depends on how the land and wood are managed after the trees come down.

This is why “just plant more trees” is not a full solution.

Please do not come for me. Planting trees is great. Gold star to all who do it. But a sapling tree does not immediately replace the carbon storage of a mature forest. It can take decades, sometimes longer, for a new forest to rebuild what was lost. And if the land is permanently converted, that forest carbon bank may never fully recover.

This is also why national forests matter so much.

National forests are not just pretty places to camp, hike, fish, wander, and breathe deeply. They are working ecosystems. They store carbon. They protect water. They shelter wildlife. They cool the landscape. They hold soil in place. They give people access to the outdoors. And yes, they are part of the climate story.

When we talk about protecting forests, we are not only talking about saving scenery. We are talking about keeping carbon stored where it belongs.

That does not mean every single tree can never be cut. Forest management is more complicated than that. Fire risk, invasive species, disease, community safety, Indigenous stewardship, wildlife habitat, recreation, and sustainable timber all belong in the conversation.

But the big idea is simple:

When forests fall, we lose more than shade.

• We lose carbon storage.

• We lose future carbon capture.

• We disturb soil.

• We alter habitat.

• We change water systems.

• We open the vault.

And once that carbon is out, we cannot just shove it back in by planting a few trees and calling it good.

So the next time someone says, “But trees grow back,” the answer is: sometimes, yes. But carbon math has a clock. Mature forests are already doing a job that new seedlings cannot instantly replace.

Protecting forests is not just sentimental. It is practical. It is climate work. It is wildlife work. It is clean water work. It is public lands work.

And it turns out those quiet trees have been holding more than we realized.

P.S. Got your own burning question about outdoor life? Drop us a line — Trail Mail is always open.

This story is part of The 89 Percent Project, an initiative of the global journalism collaboration Covering Climate Now.