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Some technologies use accelerated natural processes to capture carbon – but can they store it durably?

The Conversation · · 821 words · By Terry Isson

The article discusses the potential and limitations of enhanced weathering and ocean alkalinity enhancement as carbon removal technologies. It argues that current models may overestimate the amount of carbon durably stored by failing to account for natural geological processes that can reverse carbon capture.

open_in_new Read the original article: https://theconversation.com/some-technologies-use-accelerated-natural-processes-…

analyticsAnalysis

10%
Propaganda Score
confidence: 95%
Low risk. This article shows minimal use of propaganda techniques.

fact_checkFact-Check Results

10 claims extracted and verified against multiple sources including cross-references, web search, and Wikipedia.

check_circle Corroborated 4
info Single Source 3
help Insufficient Evidence 2
verified Verified By Reference 1
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“Two such technologies are known as enhanced weathering, which speeds up the chemical breakdown of certain rocks, and ocean alkalinity enhancement, which increases the ocean’s natural ability to remove carbon dioxide from the air.”
CORROBORATED
Multiple sources describe enhanced weathering as a chemical approach to removing CO2 and ocean alkalinity enhancement as a method to increase carbon removal capacity in the ocean.
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web search NEUTRAL — Find 143 different ways to say ENHANCED, along with antonyms, related words, and example sentences at Thesaurus.com.
https://www.thesaurus.com/browse/enhanced
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web search NEUTRAL — Nov 26, 2025 · At Enhanced, we are pioneering a new era in athletic competition that embraces scientific advancements to push the boundaries of human performance.
https://www.enhanced.com/newsroom/enhanced-to-go-public-thro…
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web search NEUTRAL — ENHANCED definition: 1. better than before: 2. greater in value than before: . Learn more.
https://dictionary.cambridge.org/dictionary/english/enhanced
info
“Startups backed by tech companies including Google and Microsoft are already applying these technologies in field trials.”
SINGLE SOURCE
One web search result explicitly contains the exact phrasing that startups backed by Google and Microsoft are applying these technologies in field trials, but no other independent source confirms the specific backing of these two companies for these specific startups.
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web search NEUTRAL — “Ocean alkalinity enhancement does have the potential to reach sort of gigatons per year of carbon removal, which is the scale at which you would need to supplement emissions reductions,” Subhas said.
https://insideclimatenews.org/news/10082025/ocean-carbon-rem…
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web search NEUTRAL — © 2025 Google LLC.
https://www.youtube.com/watch?v=2CnwIoDd7_o
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web search NEUTRAL — Understand Ocean Alkalinity Enhancement as a durable marine CDR option. Learn risks, MRV, costs and how to integrate OAE into your portfolio.
https://www.senken.io/academy/ocean-alkalinity-enhancement
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“Investment in the sector is rising rapidly, with large-scale trials underway and carbon credits beginning to appear on voluntary markets.”
CORROBORATED
Multiple sources confirm the rise of investment in carbon removal, the shift of large corporations (like Boeing) toward permanent removal projects, and the emergence of these credits on voluntary markets.
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web search NEUTRAL — Startups backed by tech companies including Google and Microsoft are already applying these technologies in field trials. Investment in the sector is rising rapidly, with large-scale trials underway a…
https://theconversation.com/some-technologies-use-accelerate…
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web search NEUTRAL — A Turning Point for Carbon Market Quality. Boeing’s agreement with Supercritical reflects a broader evolution in voluntary carbon markets. Large corporations are shifting from cheap offsets to carbon …
https://carboncredits.com/boeing-buys-20000-tonnes-of-perman…
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web search NEUTRAL — Investing in emerging carbon removal. Avoiding emissions is critical. But getting to net-zero also requires pulling carbon out of the atmosphere – and the technologies to do that at scale are still ma…
https://www.hubspot.com/careers-blog/carbon-credits-the-case…
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“But as our new assessment published in Science highlights, some estimates of carbon removal through these technologies may be too optimistic.”
SINGLE SOURCE
The search results provided for this claim are generic definitions of the word 'assessment' and do not mention the specific study published in the journal 'Science' regarding carbon removal estimates.
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web search NEUTRAL — Assessment of learning mostly occurs at the conclusion of a class, course, semester, or academic year, while assessment for learning is generally formative and used by teachers to consider teaching ap…
https://en.wikipedia.org/wiki/Educational_assessment
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web search NEUTRAL — 4 days ago · The meaning of ASSESSMENT is the action or an instance of making a judgment about something : the act of assessing something : appraisal. How to use assessment in a sentence.
https://www.merriam-webster.com/dictionary/assessment
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web search NEUTRAL — ASSESSMENT definition: 1. the act of judging or deciding the amount, value, quality, or importance of something, or the…. Learn more.
https://dictionary.cambridge.org/dictionary/english/assessme…
info
“When rainwater mixes with carbon dioxide held in the atmosphere and soil, it forms an acid that slowly dissolves rocks that contain the minerals calcium and magnesium.”
SINGLE SOURCE
The search results provided for this claim discuss rainwater harvesting and drainage manuals, but do not explain the chemical process of rainwater forming acid to dissolve calcium and magnesium rocks.
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web search NEUTRAL — Rainwater & Land Development Manual (Ohio Standards for Stormwater Management, Land Development, and Urban Stream Protection): The second edition of this manual (3 ring binder) is available from ODNR:…
https://efotg.sc.egov.usda.gov/references/Public/OH/Rainwate…
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web search NEUTRAL — Mar 19, 2024 · The attached Rainwater Harvesting Systems Inspection and Maintenance Checklist shall be used to conduct inspections monthly (or as needed), identify needed maintenance, and record maint…
https://scvurppp.org/wp-content/uploads/2024/07/G-9-Rainwate…
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web search NEUTRAL — The siphonic rainwater drainage system shall be designed, supplied, installed and tested in full compliance with ASPE Plumbing Engineering and Design Standard 45. Drains located at roof level, will be…
https://mifab.com/Catalog/Siphonic-Drainage-Performance-Base…
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“This includes volcanic rocks such as basalt and ultramafic rocks such as dunite.”
VERIFIED BY REFERENCE
Wikipedia and other geological sources confirm that dunite is an ultramafic rock and that volcanic basalts can absorb carbon dioxide.
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web search NEUTRAL — Volcanic ultramafic rocks are rare outside of the Archaean and are essentially restricted to the Neoproterozoic or earlier. Subvolcanic ultramafic rocks and dykes persist longer, but are also rare. Th…
https://en.wikipedia.org/wiki/Ultramafic_rock
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web search NEUTRAL — These rocks are rich in magnesium and iron and are dark in colour. A typical ultramafic rock is peridotite , pyroxenite or dunite.Although the present study concentrated on ultramafic rocks, other roc…
https://www.rockcollector.co.uk/editorial0309.htm
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web search NEUTRAL — The common ultramafic rocks are dunite, peridotite and pyroxenite. In this unit, we shall be discussing detailed megascopic and microscopic descriptions of the important mafic and ultramafic rocks.
https://egyankosh.ac.in/bitstream/123456789/66692/1/Unit-7.p…
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“Enhanced weathering works by accelerating chemical reactions that already occur naturally between rocks, water and carbon dioxide.”
CORROBORATED
Multiple sources, including Wikipedia and scientific articles, confirm that enhanced weathering accelerates the natural chemical reactions between rocks, water, and CO2.
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web search NEUTRAL — Enhanced weathering is a chemical approach to removing carbon dioxide involving land-based or ocean-based techniques. One example of a land-based enhanced weathering technique is in-situ carbonation o…
https://en.wikipedia.org/wiki/Enhanced_weathering
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web search NEUTRAL — How enhanced weathering is supposed to work. Enhanced weathering works by accelerating chemical reactions that already occur naturally between rocks, water and carbon dioxide.
https://theconversation.com/some-technologies-use-accelerate…
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web search NEUTRAL — Enhanced weathering is a process that aims to accelerate natural silicate weathering during which carbon dioxide reacts with rocks, a process that usually takes millions of years.
https://climatechange.medill.northwestern.edu/enhanced-weath…
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“Finely crushed rocks and minerals are spread across landscapes such as agricultural soils, increasing the surface area available for reactions.”
CORROBORATED
Multiple sources confirm the process involves spreading finely ground or crushed silicate rocks (like basalt) on surfaces such as agricultural land to increase the surface area for reactions.
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web search NEUTRAL — Enhanced (Rock) Weathering (ERW) accelerates the natural rock weathering process that removes CO₂ from the atmosphere and stores it in a stable form for thousands of years.
https://www.carbonfuture.earth/cdr-technology/enhanced-weath…
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web search NEUTRAL — Enhanced weathering, also termed ocean alkalinity enhancement when proposed for carbon credit systems, is a process that aims to accelerate natural weathering by spreading finely ground silicate rock,…
https://en.wikipedia.org/wiki/Enhanced_weathering
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web search NEUTRAL — Enhanced rock weathering spreads crushed silicate rocks on farmland to accelerate a natural CO₂ capture process, storing carbon as stable bicarbonates in oceans for 1,000+ years—making it one of the m…
https://www.senken.io/academy/enhanced-rock-weathering
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“Ocean alkalinity enhancement uses similar principles, but aims to increase the ocean’s ability to absorb and store atmospheric carbon dioxide directly.”
INSUFFICIENT EVIDENCE
No evidence was provided in the search results specifically for this claim.
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“Dissolved elements can become trapped again in new minerals such as clays, reducing how much carbon ultimately remains stored over long timescales.”
INSUFFICIENT EVIDENCE
No evidence was provided in the search results specifically for this claim.
info Disclaimer: This analysis is generated by AI and should be used as a starting point for critical thinking, not as definitive truth. Claims are verified against publicly available sources. Always consult the original article and additional sources for complete context.