Conversation With AI on Biochar

Q & A with Anthropic’s Claude Sonnet 4.6 on Biochar 2/22/26 and 3/7/26

By Raymond Baltar

I recently read what I consider to be an important essay on the current state of AI titled “Something Big is Happening” by an industry insider named Matt Schumer. While this is somewhat of an obvious statement to anyone who has been following AI’s most recent models and the industry’s massive investments in infrastructure, in the (long) piece he lays out his view that we have reached a point where AI is improving on itself, at an ever accelerating pace.  This is increasing both the speed for model improvements and their capabilities. The warnings by other industry insiders of likely massive job disruption—particularly in good paying, middle class jobs in law, finance, journalism, and tech—are real. While it is not time to panic, it is time to start learning how to use and leverage these increasingly capable tools in our own businesses and industries or risk being left behind by those who are.  

While I have been guilty as many others my age of using ChatGPT and Claude primarily as a better replacement for Google search, based on the Shumer essay I recently experimented with Anthropic’s Sonnet 4.6 to rebuild a website, and create a complex data logger for our pyrolysis operations at the Napa Recycling facility that can be accessed online. I was truly blown away by how well both were crafted, and with the back-and-forth interactions I had with the model to make minor style corrections or simply improve on things I wanted to add or change. This thing was downright friendly!

While these were relatively simple, basic requests, and I did not even use Anthropic’s most capable model Opus 4.6 that can handle much more complex, multi-stage tasks, I can see that we are indeed already in a world where folks with little or no training and $20 bucks a month can produce highly technical (and even creatively interesting) work.  I simply can’t imagine where we will be in 2 to 5 years.

Are there major environmental, energy, and moral issues associated with the development of AI? Absolutely! I believe that the companies developing this industry, and likely the government, need to spend much more money and effort addressing these problems. And certainly the dangers we face for AI’s use for military applications and by bad actors is very real. But that discussion will require another post, and likely on another forum.

Anyway, with all this in mind I decided to ask Sonnet 4.6 some questions about the biochar industry, and you can decide for yourself how helpful this information might be. At SBI we have a long history of trying to move the biochar agenda forward so most of my questions are focused on what this particular AI “thinks” about this topic. While many of these answers will be familiar to those that are actively involved with some aspect of the biochar ecosystem, and of course some may be subject to dispute, Overall, in my humble opinion,  the answers are both credible and insightful and may be particularly helpful for those starting on their own biochar journey.

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Conversation #1.   2/22/26

RB:  Looking through a financial sustainability lens, what are the five most important factors that would influence scaling the current biochar industry?

Sonnet 4.6: This is a rich question — and the answer shifts depending on whether you’re looking at it from a producer, investor, or policy standpoint. Here are the five factors I’d argue matter most, ranked by leverage:

1. Carbon Credit Market Maturity Biochar’s financial viability at scale hinges heavily on whether high-quality, durable carbon removal credits command a stable and sufficient price. Right now the voluntary carbon market is fragmented — prices for biochar credits range wildly, verification standards vary between registries (Puro.earth, Gold Standard, Verra), and corporate buyers remain skittish after high-profile greenwashing scandals in other credit categories. Until there’s a liquid, trustworthy market with prices consistently above ~$150–200/tonne CO₂e, most biochar operations can’t close their financial models on carbon revenue alone. Compliance markets — like California’s cap-and-trade or the EU ETS — are the prize, but biochar isn’t yet a recognized offset methodology in most of them.

2. Feedstock Cost and Supply Chain Reliability Biochar economics are brutally sensitive to feedstock. Forest slash, agricultural waste, and urban wood waste are theoretically abundant — but aggregating, transporting, and processing them at consistent quality is expensive and logistically complex. Operations that can co-locate with a reliable waste stream (a sawmill, a municipal green waste facility, a food processor) have a structural cost advantage. The industry can’t scale without stable, low-cost feedstock contracts, which in turn requires longer-term partnerships with feedstock generators who currently have competing disposal options (burning, landfill, composting).

3. Co-Product Revenue Diversification Biochar-only revenue models are fragile. The operations with the strongest unit economics are those that monetize multiple outputs from the same pyrolysis process — biochar for soil amendment, heat energy for drying or on-site use, syngas for electricity generation, and potentially bio-oil for industrial applications. This co-product stack is what makes pyrolysis financially competitive with incineration or composting. Investors and lenders are far more likely to finance facilities that aren’t dependent on a single revenue stream — particularly one (carbon credits) that’s still price-volatile.

4. Permitting and Regulatory Clarity The ARTi unit at American Canyon is a perfect case study here — four years of permitting for one containerized unit. That timeline is a capital killer. Air quality permits, feedstock classifications, and land use approvals vary enormously by jurisdiction, and the regulatory frameworks in most states weren’t written with small-scale distributed pyrolysis in mind. Until permitting pathways are standardized and streamlined — especially for mobile and containerized units — the time-to-revenue risk will keep many investors on the sidelines and limit the speed at which operations can replicate across sites.

5. Agronomic Value Certification and End-Market Development Carbon credits get most of the attention, but the long-term financial sustainability of the industry may depend more on whether biochar commands a consistent premium as a soil amendment product. Right now buyers range from premium vineyards willing to pay $800–1,200/tonne for certified biochar to commodity compost operations that won’t pay much above the cost of alternatives. Building that end market requires standardized product certification (IBI and EBC standards help but aren’t universally recognized), documented agronomic ROI that farmers can bank on, and distribution infrastructure that doesn’t yet exist at scale. A robust agricultural end market would de-risk the business model significantly — it’s a revenue stream that doesn’t depend on policy or voluntary corporate commitments.

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The through-line across all five is de-risking the revenue stack — the industry needs at least two or three of these factors to mature simultaneously before institutional capital flows in at the volume needed for real scale. Right now biochar sits in an awkward valley: too proven to be speculative, but not proven enough at scale to be bankable by conventional standards. Organizations like SBI that are building the demonstration record, policy relationships, and market education infrastructure are doing the foundational work that makes eventual scaling possible.

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RB: What are the top 5 markets for biochar in the SF Bay Area? In California? In the whole US?

Sonnet 4.6: Here’s a breakdown of the top biochar markets at each geographic level, based on current research and industry reports:

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SF Bay Area — Top 5 Biochar Markets

The Bay Area is a hub for sustainability-focused buyers. The leading markets here are:

1. Urban & Community Agriculture / Market Gardens — Small farms, urban growers, and CSAs around the Bay are increasingly using biochar for soil amendment, driven by strong consumer demand for organic produce.
2. Landscape & Green Infrastructure — City and county projects (bioswales, urban forestry, parks) use biochar in tree planting mixes and stormwater filtration systems. SF and Oakland have been active here.
3. Composting Operations / Compost-Biochar Blends — Bay Area composters (e.g., Recology) are exploring biochar additions to finished compost for nutrient retention and carbon sequestration credits.
4. Carbon Credit / Voluntary Carbon Markets — The Bay Area tech sector’s heavy interest in carbon offsets makes this a significant demand driver; companies and startups purchase biochar carbon removal credits.
5. Water/Wastewater Filtration & Remediation — Bay Area municipal utilities and environmental consultants use biochar for contaminant removal (heavy metals, nitrates) in stormwater and groundwater treatment.

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California — Top 5 Biochar Markets

Research on California’s biochar market identifies soil-based agricultural applications as the most likely near-term market, followed by filtration, livestock feed, and manure management. ResearchGate More specifically:

1. Agriculture / Soil Amendment (Central Valley) — By far the largest market. California’s Central Valley, with its massive almond and orchard industry, is a key region where converting agricultural biomass waste to biochar creates significant economic and environmental opportunity. Springer
2. Carbon Markets / Carbon Sequestration Credits — California’s cap-and-trade program and voluntary carbon markets make it one of the most active states for biochar carbon removal purchases.
3. Wildfire Debris & Forest Residue Management — CAL FIRE and state agencies are actively exploring converting forest slash and fire-damaged biomass into biochar to reduce fire risk and generate a revenue stream.
4. Stormwater, Water Filtration & Soil Remediation — State regulations around water quality drive demand for biochar in municipal filtration and brownfield remediation projects.
5. Composting / Organic Waste Diversion — California’s strict organics recycling mandates (SB 1383) are pushing compost producers to explore biochar-compost blends to improve product value and reduce emissions.

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United States — Top 5 Biochar Markets

Agriculture is the dominant application nationally, accounting for over 72% of revenue share in 2025. Grand View Research The top five markets are:

1. Agriculture / Soil Amendment — The largest and most established market, covering row crops, orchards, vineyards, and regenerative farms across the Midwest, Southeast, and West.
2. Carbon Removal / Voluntary Carbon Credits — Favorable government initiatives and increasing funding for biochar R&D, combined with partnerships between research institutes and manufacturers, have fueled strong demand for biochar in carbon markets. IMARC
3. Animal Feed & Livestock — The U.S. agricultural community is actively exploring biochar to improve animal health and reduce methane emissions from ruminants, integrating it into livestock feed or bedding. Inkwood Research
4. Water & Environmental Remediation — Biochar is used in municipal stormwater systems, mine drainage treatment, and groundwater cleanup; a growing area as EPA regulations tighten.
5. Horticulture, Turf & Specialty Growing — Golf courses, nurseries, greenhouses, and sports turf operations use biochar for water retention and root zone improvement — a niche but fast-growing segment.

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Overall trend: The U.S. biochar market was valued at $543 million in 2024 and is projected to reach $1.38 billion by 2033, driven by growing demand for sustainable agriculture, carbon sequestration goals, and waste-to-resource initiatives. IMARC California, with its agricultural scale, climate policies, and tech-sector carbon demand, is positioned as one of the most important state-level markets in the country.

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RB: Which of these markets, if scaled, would provide the most jobs? And the most GHG emissions savings?

Sonnet 4.6: Great strategic questions. These two dimensions — jobs and GHG savings — don’t always point to the same market, so let me break them down carefully.

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Most Jobs if Scaled

Winner: Agriculture / Soil Amendment

This market, if scaled, would generate the most jobs across the entire value chain:

• Feedstock collection & logistics — gathering agricultural waste, wood chips, forest residues requires significant rural labor
• Biochar production facilities — pyrolysis plant operators, technicians, QA staff
• Application & distribution — spreading biochar on farmland is labor-intensive at scale, especially in specialty crops (orchards, vineyards)
• Agronomic consulting — farmers need guidance on application rates and blending

Agriculture wins because it’s spatially distributed — you can’t centralize it. Hundreds or thousands of small-to-mid-scale production units near feedstock sources would be needed, multiplying jobs across many regions. In California alone, the Central Valley could support dozens of regional biochar facilities.

Close second: Wildfire / Forest Residue Management

This market is particularly compelling for job creation because it addresses two crises simultaneously — unemployment in rural timber-dependent communities and catastrophic wildfire risk. Mobile pyrolysis units deployed across national and state forests would require crews for:

• Slash pile collection and chipping
• Mobile unit operation and maintenance
• Carbon monitoring and verification

These jobs would be concentrated in underserved rural communities that desperately need economic diversification.

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Most GHG Savings if Scaled

Winner: Wildfire Debris & Forest Residue Management

This one isn’t close, for a few compounding reasons:

1. Direct carbon sequestration — biochar is roughly 70–90% stable carbon that persists in soil for hundreds to thousands of years, locking away CO₂ that would otherwise return to the atmosphere
2. Avoided emissions from decomposition — forest slash left on the ground decomposes and releases CO₂ and methane over years
3. Avoided wildfire emissions — catastrophic wildfires are among California’s single largest annual GHG emission sources; some years California wildfires emit more CO₂ than the entire electricity sector. Converting that biomass to biochar before it burns is a massive avoided-emissions opportunity
4. Feedstock scale — California alone has an estimated 20+ million acres of fire-prone forests with enormous volumes of burnable biomass

Close second: Carbon Markets / Carbon Removal Credits

While this is more of a financing mechanism than a sector unto itself, scaling structured carbon credit purchasing would directly fund the highest-sequestration biochar projects regardless of end use, essentially acting as a multiplier on GHG savings across all other markets.

Third: Agriculture / Soil Amendment

Agricultural biochar sequesters meaningful carbon, but the GHG math is somewhat diluted compared to forest biomass — agricultural feedstocks are smaller in scale, and some biochar applied to soil may be tilled or disturbed. Still significant at scale.

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The Big Picture

Market	Jobs Potential	GHG Savings Potential
Agriculture / Soil Amendment	⭐⭐⭐⭐⭐	⭐⭐⭐
Wildfire / Forest Residue	⭐⭐⭐⭐	⭐⭐⭐⭐⭐
Carbon Markets	⭐⭐	⭐⭐⭐⭐
Composting / Organics	⭐⭐⭐	⭐⭐⭐
Water & Remediation	⭐⭐	⭐⭐

The strategic sweet spot — if you’re trying to maximize both jobs and GHG savings simultaneously — is forest residue / wildfire biochar, especially in California. It hits rural job creation, fire risk reduction, carbon sequestration, and avoided wildfire emissions all at once. It’s arguably the highest-impact single biochar application available, and it’s currently underleveraged relative to its potential.

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RB: What are the biggest barriers to scaling biochar, and why are the best pathways to break through them?

Sonnet 4.6: Biochar has genuine potential as a carbon removal and soil amendment technology, but it faces a cluster of interconnected barriers that have kept it from scaling despite decades of interest.

The core economic problem

Biochar is expensive to produce — typically $200–600+ per tonne depending on feedstock, pyrolysis technology, and scale — but commands low prices in most markets. Agricultural buyers might pay $50–150/tonne as a soil amendment, and carbon credits have historically priced in a similar range. This means most producers can’t cover costs without subsidies or stacking multiple revenue streams simultaneously. The pathway through this is twofold: voluntary carbon markets need to mature and price biochar credits more accurately (reflecting its multi-century durability, which should command a premium over lower-permanence credits), and the co-benefits of biochar — improved water retention, reduced fertilizer needs, methane suppression in livestock — need to be better quantified and monetized.

Feedstock supply and quality

Sustainable, affordable feedstock — agricultural residues, woody biomass, sewage sludge, food waste — is geographically dispersed, inconsistent in quality, and often already claimed by competing uses like composting or direct energy. Some feedstocks introduce contaminants (heavy metals, PAHs) that limit where the biochar can be applied. Solving this requires co-locating production with large consistent feedstock sources (timber mills, food processors, wastewater treatment), developing regional aggregation networks, and creating clear regulatory standards that give buyers confidence in product quality. The EU’s EBC (European Biochar Certificate) and IBI standards are steps in the right direction, but adoption is inconsistent.

Carbon credit credibility and MRV

Unlike direct air capture, biochar’s carbon accounting is complex. How long does the carbon actually stay sequestered in a given soil and climate? What’s the net lifecycle balance accounting for transport and production emissions? Inconsistent methodologies have created a credibility problem — some early biochar credits were arguably oversold. The pathway here is rigorous, standardized MRV (monitoring, reporting, and verification) frameworks, which organizations like Puro.earth and more recently the CRCF in Europe are working toward. Better permanence modeling tied to specific biochar recalcitrance indices (like the H:Corg ratio) is making this more tractable.

Capital and scale-up risk

Pyrolysis plants require meaningful upfront capital ($1–20M+ depending on scale), and investors face technology risk, feedstock risk, and market risk simultaneously. Most biochar producers are small, preventing the economies of scale that would reduce costs. The breakthrough here is probably less about novel technology and more about modular, replicable plant designs that lower the cost of capital by reducing bespoke engineering, paired with long-term offtake agreements from corporate buyers committed to carbon removal portfolios (Microsoft, Stripe, Shopify, etc. have been important here).

Agronomic uptake and farmer behavior

Even where biochar is available and priced competitively, farmer adoption is slow because the benefits are highly soil- and crop-specific, often taking years to materialize, and there’s limited local agronomic knowledge. Extension services rarely cover it, and farmers are rationally skeptical of novel inputs. Long-term field trials and demonstration projects — particularly in degraded tropical soils where the benefits are largest and fastest — are necessary to build the evidence base and word-of-mouth adoption.

The most promising integrated pathway

The strongest near-term scaling model is probably pyrolysis plants co-located with industrial biomass waste streams (sawmills, rice mills, palm waste facilities) in regions with degraded agricultural soils and supportive carbon policy. Revenue stacking — carbon credits + soil amendment sales + heat/energy recovery from the pyrolysis process — is what makes the economics work. Coupling this with credible corporate carbon removal buyers who provide advance market commitments reduces investor risk enough to unlock capital. Over the medium term, if carbon markets price permanence properly, biochar’s 500–1000 year sequestration advantage over biological approaches becomes a decisive economic differentiator.

The honest summary is that biochar doesn’t face a single hard technical barrier — the technology works. It faces a coordination problem: feedstock logistics, carbon market infrastructure, agronomic knowledge diffusion, and capital formation all need to develop in parallel, which is harder to solve than any single technical challenge.

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RB: What about permitting for production facilities, both in local air districts and USEPA regulations?

Sonnet 4.6: Permitting is actually one of the most underappreciated barriers to biochar scaling in the US, and it can add years and significant cost to a project even when the economics otherwise work.

The fundamental regulatory ambiguity

Biochar production through pyrolysis doesn’t fit neatly into existing regulatory categories. Depending on how regulators classify the process — is it waste processing? biomass energy generation? a chemical manufacturing process? — entirely different regulatory frameworks can apply, and the classification can vary by jurisdiction, feedstock, and whether energy is being recovered. This ambiguity itself is a barrier because it creates uncertainty that chills investment before a single permit application is even filed.

Local and state air district permitting

This is often the sharpest practical obstacle. Pyrolysis produces syngas, carbon monoxide, volatile organic compounds, particulate matter, and depending on feedstock, potentially dioxins, furans, and heavy metal-bearing emissions. Local air quality management districts — particularly in California under CARB and its regional districts like the Bay Area AQMD or San Joaquin Valley APCD — apply stringent New Source Review requirements and Best Available Control Technology standards that can require extensive emissions testing, stack monitoring equipment, and afterburner or scrubbing systems that significantly increase capital costs.

The problem is that most air districts have little to no experience with pyrolysis specifically. Permitted categories like “biomass combustion” or “industrial boiler” don’t map cleanly, so permitting staff often default to the most conservative interpretation, applying requirements designed for much larger or dirtier processes. A small modular biochar unit producing a few tonnes per day can end up facing the same permitting scrutiny as a large industrial facility, eliminating the economic viability of smaller distributed systems — which are often the most logical configuration given feedstock dispersal.

Conditional use permits from local land use authorities layer on top of air permits and add another venue where neighbors, local governments, or advocacy groups can raise concerns about odor, truck traffic, and visual impacts, even for facilities with strong emissions controls.

Federal EPA dimensions

At the federal level, several regulatory programs create friction depending on facility configuration and feedstock. The most significant is the distinction between biomass and waste feedstocks under RCRA. If a facility processes materials that could be classified as solid waste — certain agricultural residues, food waste, sewage sludge — it may trigger RCRA permitting requirements, which are substantially more burdensome than air permits alone. Producers using clean woody biomass can often avoid this, but the line is not always clear and EPA regional offices interpret it differently.

The Clean Air Act’s Major Source thresholds under Title V are another concern for larger facilities. A facility emitting above certain tonnage thresholds for criteria pollutants becomes subject to full Title V operating permits, which involve federal review, public comment periods, and ongoing compliance monitoring that can take two to four years to navigate. Most biochar facilities are designed to stay below these thresholds, but it constrains facility sizing decisions in ways that work against economies of scale.

EPA’s regulations around co-firing and energy recovery from pyrolysis gas also create complications. If a facility burns syngas for heat or electricity — which is often essential to the thermal efficiency and economics of the operation — it may trigger additional New Source Performance Standards depending on how that combustion unit is classified.

Sewage sludge biochar is its own problem

Pyrolysis of sewage sludge (biosolids) has attracted significant interest because municipalities are desperate for alternatives to landfilling or land application under increasingly restrictive biosolids regulations, especially given PFAS contamination concerns. But the regulatory picture here is particularly complex. EPA’s 503 regulations govern biosolids, and there is currently no clear regulatory pathway for biosolids-derived biochar as a distinct product category. Some producers have argued that pyrolysis destroys PFAS and produces a clean product, and the science is increasingly supportive, but EPA has not formally addressed this, leaving state regulators to make inconsistent determinations.

Pathways through the permitting barriers

The most effective near-term strategies tend to involve a few approaches. Engaging air districts early and collaboratively — before filing formal applications — to help regulators develop familiarity with the technology pays dividends, even though it adds time upfront. Some producers have worked with districts to establish pilot operating permits that allow emissions characterization before full permit requirements are set, which benefits both parties.

Industry associations like the US Biochar Initiative have been working to develop model permit language and engage with EPA and state agencies on clearer categorical guidance. This kind of pre-competitive regulatory development is probably the highest-leverage policy intervention available, since a single clarifying guidance document from EPA or a state agency can unlock permitting for dozens of facilities simultaneously.

Siting in jurisdictions with more permitting experience or more favorable regulatory cultures matters more than many project developers initially appreciate. Some states — Colorado, Oregon, Washington — have made more progress on clear pathways than others. And federal facilities or projects on tribal lands sometimes offer permitting environments with different dynamics that can be more tractable.

Longer term, the cleanest solution is EPA developing a specific regulatory category for pyrolysis-based biochar production with tailored emissions standards that reflect actual risk rather than worst-case assumptions inherited from other industrial categories. That would require a formal rulemaking process, but the technology is mature enough that the emissions profile is well characterized, and the regulatory case for a dedicated pathway is reasonable. Whether EPA has the bandwidth and political will to prioritize it is another question.

 

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Conversation #2.  3/7/26

RB: What is the best way to use AI models to scale the use of biochar production and use?

Sonnet5 4.6: This is a genuinely interesting question and one where I can offer some considered thinking — though I should be upfront that my knowledge cuts off in mid-2025, so some of the most recent developments in production tech or regulatory frameworks may have moved on. Scaling biochar production and use is a genuinely exciting area where AI can add real leverage across several parts of the value chain. Here’s how AI models can help most effectively:

Feedstock Optimization AI can analyze satellite imagery, agricultural data, and waste stream inventories to identify the best local feedstock sources — crop residues, forestry waste, manure — and predict seasonal availability. This is crucial because feedstock quality heavily determines biochar properties.

Pyrolysis Process Control Machine learning models can optimize temperature curves, residence times, and oxygen levels in real time during pyrolysis to maximize yield, energy efficiency, and specific biochar characteristics (surface area, pH, porosity) for a target application. This is one of the highest-impact use cases since process control is currently a bottleneck.

Biochar Characterization and Matching AI can predict biochar properties from feedstock and process parameters, then match biochar batches to the most suitable applications — soil amendment for a particular crop type, water filtration, carbon sequestration — without requiring expensive lab testing every time.

 

Carbon Accounting and MRV AI-assisted monitoring, reporting, and verification (MRV) can make biochar carbon credits more credible and cheaper to certify, which unlocks carbon market financing — one of the key levers for scaling production economically.

 

The Strategic Approach

The most practical way to start is usually to focus AI on the process control and soil-matching problems first, since those have the clearest ROI and the most available training data. Building a data infrastructure early — sensors on kilns, soil test databases, yield records — is essential because AI is only as good as the data fed into it.

Coupling AI tools with community-scale or distributed pyrolysis units (rather than waiting for large centralized facilities) is also likely the fastest path to meaningful scale, since it allows parallel deployment and learning across many contexts simultaneously.