Why Forest Credits Are More Complicated Than They Look
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A forest should* be the simplest carbon removal tool. It isn’t. And understanding why matters before you buy.*
Dear IMPT Family,
A tree absorbs CO₂. A forest absorbs more CO₂. Forests are being cut down. So if you protect a forest, you’re saving the carbon, right? You get a credit, retire it, problem solved.
Not quite. Forest carbon is messier than it looks. Here’s why a forest project can be brilliant one year and bankrupt the next. Or issue credits it can’t deliver on. Or solve the climate crisis for a region while just shifting deforestation pressure somewhere else.
Understanding forest credits means understanding the actual risk involved.
🔥 Key Highlights 🔥
1️⃣ Forests sequester 2–5 tonnes of CO₂ per hectare per year depending on age, species, and climate
2️⃣ A mature forest can store 200–400 tonnes total — but only if it never burns or gets logged
3️⃣ “Permanence” is assumed at 100 years; many projects struggle to guarantee 40
4️⃣ Wildfire risk is rising — climate change makes forests burn hotter and faster
5️⃣ Logging pressure often just shifts to a different forest (“leakage”)
6️⃣ Good forest credits are expensive (€20–40) because of the real risks built in
1️⃣ The Basic Math — And Why It’s Optimistic
A fast-growing forest in a tropical climate might absorb 10 tonnes of CO₂ per hectare per year at peak growth. A boreal (northern) forest might absorb 1–2 tonnes. The rule of thumb: 2–5 tonnes per hectare per year on average over the forest’s lifetime.
But here’s the catch: a young forest is a carbon sink (it absorbs more than it releases). A mature, old-growth forest is roughly carbon neutral (it absorbs what it releases through decay and decomposition). A dying or damaged forest is a source (it releases more carbon than it absorbs).
This means the “optimal” carbon forest is 30–60 years old. Young enough to be growing rapidly, old enough to have real mass. Older than that and you’re just maintaining the carbon you already have, not removing new carbon from the air.
The problem: a forest that’s optimal for carbon is also optimal for logging. Perfect timber. This creates perverse incentives.
2️⃣ The Permanence Problem
A forest carbon credit assumes the forest will stay standing for 100 years. That’s the standard in Verra, Gold Standard, and other frameworks. 100 years of permanence. No logging. No clearing. No catastrophic fire.
But a lot can happen in 100 years. The government changes. A new corporation buys the land. Climate change makes the forest vulnerable. Or the project just runs out of money.
In practice, most forest carbon projects assume 40–50 years of realistic permanence. This is often why forest credits come with “buffer pools” — the project issues 80 credits and holds 20 in reserve. If the forest fails early, the buffer absorbs the loss.
This is honest, but it also means each forest hectare generates fewer credits than the raw carbon math would suggest.
3️⃣ The Wildfire Issue
Climate change is making forests burn hotter, faster, and more frequently. California’s recent fires have burned through certified forest carbon projects, releasing decades of stored carbon in weeks. When that happens, the credits that were already issued and potentially retired become — well, debatable. If the carbon is back in the atmosphere, did you get what you paid for?
This is a real issue with no perfect solution. Some projects use satellite monitoring to detect fire risk early and pre-harvest timber to reduce fuel load. But this creates a new problem: if the project actively harvests the forest, are they still protecting it, or just managing it?
Other projects just accept the wildfire risk and price it in. A forest project in a high-fire region will issue fewer credits per hectare because the risk is higher.
Climate change makes all forest credits riskier. A forest project in a stable climate (say, Northern Europe) is much safer than one in an increasingly dry region (say, Australia or Southern California).
4️⃣ The Leakage Problem
You protect a forest in Indonesia. The logging company that was going to cut that forest just goes 50 km away and clears a different, unprotected forest instead. The carbon doesn’t stay protected. It just gets moved.
This is called leakage. It’s real and it’s hard to measure. Good forest projects try to prevent it by working with communities and creating alternatives to logging (ecotourism, sustainable harvesting, agroforestry). But fundamentally, if a region needs income from forests, protecting one forest just shifts pressure to another.
This is why forest projects that focus on sustainable use — managed forests where timber is harvested responsibly but the forest structure remains intact — sometimes generate more real impact than pure conservation. If the forest is generating income for the community, it’s less likely to get cleared.
5️⃣ The Additionality Trap Specific to Forests
Would this forest have been protected anyway? That’s the key question. And it’s often unclear.
A government might have a policy protecting forests. But if there’s no enforcement budget, the policy is meaningless. A carbon project that funds rangers and enforcement might be the difference between protection and illegal logging.
Or a government might be considering logging but undecided. A carbon project that pays more than the logging timber is worth might tip the balance toward protection.
But if a forest was always protected, and the carbon project just captures the value? That’s not additional.
This is why rigorous forest projects do “baseline” studies: what would have happened without carbon revenue? Good projects can articulate this clearly. Weak projects hand-wave it.
6️⃣ The Co-Benefits Myth
You’ll often hear that forest projects create “co-benefits”: jobs, biodiversity, water, local livelihoods. And they can. But they also can’t.
A pure conservation project that excludes logging also excludes jobs for loggers. Those jobs move elsewhere or disappear. The community loses income. If the carbon project doesn’t replace that income, you’ve created conservation through impoverishment.
The best forest projects create income alternatives: ecotourism, nut harvesting, carbon payments, sustainable timber. But these are harder to design and more expensive to monitor.
Cheaper forest credits often skip this work. Pure protection, zero community benefit. This isn’t always bad — protecting a forest is better than not protecting it — but it’s not the wholesome picture the marketing often paints.
7️⃣ How to Evaluate a Forest Project
Before you buy a forest carbon credit:
✔ Check the permanence guarantee — how long does it actually stay protected?
✔ Ask: would this forest have been protected anyway? (Additionality)
✔ Is the project in a high-fire or high-risk region? (Wildfire/permanence risk)
✔ Does monitoring include satellite tracking for illegal logging? (Enforcement)
✔ Are local communities involved in decision-making and benefit-sharing? (Co-benefit)
✔ Is the credit issued by a reputable standard (Verra, Gold Standard, ACR)? (Credibility)
✔ What’s the buffer pool size? (Risk pricing)
A project that scores well on all seven is expensive (€30–50 per tonne) but credible. One that’s vague on any of these is cheaper (€5–15) but riskier.
8️⃣ The Brutal Honesty
Forest credits are real. A protected forest does store carbon. A project that keeps a forest standing is preventing emissions that would have otherwise happened.
But they’re also fragile. A wildfire, a government change, economic pressure, or simply running out of project funding can turn a success into a loss overnight.
This is why forest projects alone can’t solve deforestation. They can help. They can protect key forests. They create income alternatives. But they’re not sufficient if the underlying demand for timber, agricultural land, or development is rising.
The real solution to deforestation is: reduced global demand for timber and agricultural land, stronger property rights and governance in forested regions, and economic alternatives that make forests worth more standing than cut.
Carbon projects are a tool within that solution, not the whole thing.
Looking Ahead — Forest Projects Are Getting Better
The standards are tightening. Monitoring is more sophisticated (satellite imagery catches illegal logging now). Community engagement is being weighted more heavily. Permanence guarantees are being taken more seriously.
In another 5–10 years, the weak forest projects will be gone. The ones that remain will be expensive, highly monitored, and genuinely credible. That’s progress.
For now: understand what you’re buying. A forest credit is not a guarantee. It’s a bet on a project’s ability to keep trees standing. Make sure it’s a bet you’d actually make if you understood the risks.
Let’s keep building — together. 🌍💚
