Forest Biomass in the United States: What Scales and What Doesn’t
By Alexander A. Koukoulas, A2K Consultants LLC
Special to The Digest
Forest biomass has long been positioned as a cornerstone of the U.S. bioeconomy. The logic is compelling: abundant working forests, a mature forest products industry, deep technical expertise, and increasing pressure to decarbonize materials, fuels, and energy. Yet despite decades of policy support, R&D investment, and commercial ambition, outcomes across biomass pathways have diverged sharply.
Some uses of wood scale reliably and profitably. Others—particularly wood-to-fuels and commodity chemicals—remain elusive at commercial scale. Understanding why is essential if the forest sector is to move from recurring promise to durable progress.
The System Reality: Where Wood Actually Goes
The United States harvests approximately 430–450 million green tons of wood annually, almost entirely from working forests. This volume supports one of the largest forest products systems in the world, but its structure is often misunderstood.
The overwhelming majority of harvested wood flows into two system-forming market pillars:
- Solid wood products for construction (e.g., lumber, plywood, OSB, engineered wood, etc.)
- Pulp & paper, including packaging, tissue, and specialty grades
Every other biomass pathway—pellets, chemicals, fuels, carbon, etc.—depends on the economic gravity of these two pillars. They pay for forest management, sustain harvesting and logistics infrastructure, and generate the residual streams that downstream users rely on. Figure 1 illustrates this reality clearly: construction materials and pulp & paper together account for nearly ninety percent of U.S. wood use, while fuels and chemicals remain marginal by volume.
Figure 1 – U.S. Wood Use (2024)
The Cascading Use Principle and Why the Two Pillars Matter
The dominance of wood products and pulp & paper is not accidental. It reflects what is often described as the cascading use principle: wood is first directed to its highest-value, longest-lived applications, and only later—through residues, recycling, or end-of-life recovery—flows into lower-value uses such as energy or fuels.
In practice, this means:
- Sawlogs are prioritized for construction materials, where carbon is stored for decades and economic value per ton is highest.
- Harvest and sawmill residues (e.g., tops, limbs, chips, sawdust, bark) flow into pulp, panels, pellets, and energy.
- Pulp & paper products are often recycled multiple times before fibers ultimately exit the material system.
- Only at the end of this cascade does wood typically enter energy or fuel pathways.
This cascading structure is a feature, not a flaw. It maximizes both economic value and carbon efficiency per unit of biomass, and it explains why the forest products industry has proven so durable over time.
Crucially, it also means that most emerging biomass uses do not compete for primary wood. They compete for residuals, and their success depends on the health of the upstream pillars that generate those residuals in the first place.
Why Housing Materials and Pulp & Paper Continue to Dominate
Solid wood products succeed because they convert high-quality logs into high-value materials with strong capital efficiency and deep, liquid markets. Housing demand may be cyclical, but over time it has proven remarkably resilient. Importantly, sawmills also generate chips, sawdust, and bark, which are critical inputs for pulp mills, pellet plants, and energy systems.
Pulp & paper remains one of the most integrated industrial systems in the bioeconomy. Modern mills recover chemicals, generate energy internally, and operate with capital sunk over decades. While printing and writing papers have declined, packaging, tissue, and specialty products continue to anchor demand for fiber, particularly in the U.S. South.
Together, these two pillars form the structural backbone of the cascading-use system. They stabilize stumpage prices, maintain harvesting capacity, and ensure a steady supply of residual biomass. Any strategy that weakens these pillars—intentionally or inadvertently—ultimately constrains the availability and affordability of feedstocks for downstream uses, including fuels and chemicals.
Pellets: The One New Market That Truly Scaled
Wood pellets represent the clearest example of successful biomass market expansion in the past two decades. U.S. pellet production—largely in the Southeast—scaled rapidly due to export demand, particularly in Europe.
Pellets fit naturally within the cascading use framework. They rely primarily on low-grade fiber and residues, require moderate capital investment, use proven technology, and benefit from long-term offtake contracts. Even so, pellets absorb less than 10% of U.S. harvested wood. They are meaningful, but they do not redefine the system.[i]
It is also important to recognize that residual markets are inherently local. Low-value, high-bulk materials such as green chips, bark, and sawdust are constrained by transport economics, making regional imbalances common even when the national system is in equilibrium. In this context, biorefineries—particularly those producing low-carbon fuels—can play a constructive role when tightly integrated with existing wood-processing infrastructure. Rather than serving as large-scale outlets for biomass, such facilities can act as localized pressure valves, absorbing stranded residuals and establishing a price floor that stabilizes upstream operations. Their value lies not in replacing pulp mills or material markets, but in selectively relieving regional bottlenecks within the cascading-use system.
Wood-Based Chemicals: Real, Profitable, and Constrained by Design
Wood-derived chemicals, such as tall oil derivatives, lignosulfonates, cellulose ethers, nanocellulose, and specialty sugars, all occupy defensible market positions. Their common characteristics are telling: integration with existing mills, focus on higher-margin applications, modest incremental capital, and acceptance of limited scale. These pathways sit mid-cascade: above fuels and energy, but below primary materials. They improve mill economics and resilience, but they are not volume outlets for national wood supply. They work best when they enhance the value of existing streams rather than diverting biomass from higher value uses. In fact, production of by-products, specifically tall oil and terpenes, build fundamental resiliency into pulp mill operations, improving both the bottom line and overall operating efficiency.
The Persistent Challenge of Wood-to-Fuels
For decades, wood-to-fuels has been framed as the logical next step for forest biomass. The technical pathways—thermochemical, biochemical, and hybrid—are well understood. The challenge lies elsewhere.
Key structural barriers include high delivered feedstock costs ($60–120 per dry ton), capital intensity often exceeding $1–2 billion at scale, logistics complexity tied to low bulk density and geographic dispersion, and a fundamental market mismatch: fuels are low-margin, price-volatile commodities.
Within a cascading system, fuels occupy the lowest-value rung. As a result, they struggle to compete for biomass unless supported by policy mechanisms that explicitly value carbon reduction or energy security.
It is worth noting that in many proposed wood-to-fuel pathways, operating costs are not the primary constraint. Feedstock and variable operating expenses (OPEX) can be competitive, particularly when low-carbon fuel incentives are considered. The principal barrier is capital intensity (CAPEX). Large, first-of-a-kind facilities require substantial upfront investment, long construction periods, and expose investors to compounded technology, policy, and market risks. As a result, projects that appear viable on an operating basis often fail to clear investment hurdles, reinforcing the case for smaller-scale, integrated, and infrastructure-adjacent deployment models.
A Note on Purpose-Grown Energy Crops
Some advocates argue that purpose-grown energy crops—such as switchgrass, miscanthus, or short-rotation woody crops—offer a way to avoid competition with higher-value forest products by supplying dedicated feedstocks for liquid fuels. In effect, these systems bypass the cascading-use principle by design.
While this approach can reduce feedstock competition, it does not address the central constraint facing wood-based fuels: capital intensity. Purpose-grown crops remain subject to the same fuel-market realities—low margins, price volatility, and policy dependence—while introducing additional land-use, agronomic, and logistics considerations. As a result, they represent a fundamentally different land-use strategy rather than an extension of the forest-products system described in this paper.
For the U.S. forest bioeconomy, which is anchored by working forests and long-lived material markets, purpose-grown energy crops are unlikely to play a system-forming role. Where they are deployed, they should be evaluated independently from forest biomass pathways and not assumed to substitute for the cascading use of wood.
Biofuels as a Price-Support Mechanism, Not a Volume Solution
This does not mean wood-based fuels lack strategic value. In fact, their greatest contribution may not be as large-volume outlets for biomass, but as marginal, high-value demand that increases the overall ability of the system to pay for woody residuals.
When low-carbon fuels are tightly integrated with existing mills, infrastructure, and supply chains—and when policy support is durable rather than speculative—they can act as price-support mechanisms within the cascading system. In this role, fuels complement higher-value material uses rather than displacing them.
Even relatively small volumes of fuel demand—if price-inelastic and policy-supported—can improve residual values, stabilize harvesting economics, and strengthen the broader forest products value chain.
Carbon Changes the Equation but Not the Fundamentals
Carbon markets and policies introduce an important new variable. Forest carbon credits, bioenergy with carbon capture, and carbon utilization pathways can materially affect project economics. In some cases, carbon revenues rival or exceed traditional product margins.
However, carbon does not overturn the cascading-use principle. It works best when layered onto existing, economically sound assets, not when used to justify diverting biomass from higher-value, longer-lived material uses.
As shown in Figure 2, the cost of carbon abatement varies widely across wood-based pathways. Forest management, mill efficiency, and integrated biomass systems deliver far lower-cost emissions reductions than greenfield wood-to-liquids fuels.
Figure 2 – Indicative carbon abatement cost across wood-based pathways
A Data-Driven Path Forward
The data points toward a more grounded strategy for the U.S. forest bioeconomy:
- Protect and modernize system-forming sectors. Construction materials and pulp & paper are the anchors of cascading use and sustainable forest management.
- Prioritize by-product upgrading over whole-tree conversion. Liquors, lignin, hemicellulose streams, biogenic CO2, and waste heat offer the best risk-adjusted opportunities.
- Be disciplined and selective about fuels. Where wood-to-fuels makes sense, it will be at modest scale, co-located with existing infrastructure, and positioned as a price-support mechanism.
- Use carbon to de-risk, not to rationalize. Carbon revenues should strengthen competitive assets, not undermine higher-value material uses.
Conclusion
The United States does not lack forest biomass potential. What it has often lacked is a functional alignment between biological realities, industrial systems, and capital markets.
As the data suggests, the forest bioeconomy is not a blank slate. It is a cascading system, anchored by wood products and pulp and paper, that maximizes both economic value and carbon efficiency by directing fiber first to long-lived material uses and only later to energy or fuels. These pillars are not legacy holdovers; they are the enabling infrastructure upon which all downstream biomass uses depend.
At the same time, the system is not static. Residual markets are inherently local, and regional imbalances—exacerbated by pulp capacity rationalization, logistics costs, and market cycles—often leave sawmills exposed even when national supply and demand appear balanced. In this context, selectively deployed biorefineries, particularly those producing low-carbon fuels, can play a constructive role by relieving local bottlenecks and establishing price support for stranded residuals.
Crucially, the constraint on scaling these pathways is not always operating economics. In many regions, feedstock and variable costs are already competitive. The gating factor is capital: high upfront investment requirements, long construction timelines, and the compounding effects of policy and technology risk. Recognizing this distinction points toward more credible deployment models: projects that are smaller in scale, integrated with existing assets, and aligned with regional feedstock realities, rather than stand-alone, greenfield megaprojects.
The future of forest biomass in the United States will not be defined by a single breakthrough technology or a wholesale redirection of wood flows. It will be shaped by disciplined integration: reinforcing the system-forming sectors that already work, upgrading by-products where value can be captured, and deploying fuels and carbon solutions where they strengthen—not distort—the cascading use of wood. That path may be less dramatic than the promises of the past. But it is grounded in how forests, industries, and capital actually behave, and for that reason, it is far more likely to endure.
[i] The wood pellet industry faces persistent and ongoing scrutiny for allegedly sourcing ineligible wood, including whole trees and old-growth timber, despite claims of using only “waste wood.”
About the author: Alexander A. Koukoulas, Ph.D. is an independent advisor with A2K Consultants LLC in Savannah, GA.
Category: Thought Leadership
