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Direct Air Capture: Can Machines Undo Carbon Emissions?

Published · 21 min

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A direct air capture plant can genuinely pull carbon dioxide out of ordinary air and lock it away for good. This video explains why that is true, and why almost every claim built on top of it needs a second look.

It starts with the physics: carbon dioxide is only about 0.04% of the air, hundreds of times more dilute than a factory's exhaust, which is why capturing it needs energy before a single molecule is caught. It compares the two chemistries in use - Carbon Engineering's liquid solvent, regenerated near 900C, and Climeworks' solid sorbent, regenerated near 100C on much lower-grade heat - and traces Climeworks from its 2009 founding as an ETH Zurich spin-off through its 2017 Hinwil plant, the world's first commercial DAC facility.

Then Iceland: Orca (2021) and Mammoth (2024), pairing Climeworks' capture with Carbfix's method of dissolving CO2 in water and injecting it into basalt rock, where it mineralises into stone. Mammoth's own September 2026 performance update - net removal of 675 tonnes in H1 2026, against a stated design capacity of up to 36,000 tonnes a year - sets up the video's central tension between announcement and delivery, echoed in Texas by 1PointFive's repeatedly delayed Stratos plant and the much larger South Texas DAC Hub proposed for King Ranch.

The video then separates durable storage (basalt, saline aquifers) from carbon sold for enhanced oil recovery, which a 2025 study found turns carbon-positive once a reservoir's full lifetime is counted. It walks through why gross tonnes captured and net tonnes removed are different numbers - citing peer-reviewed life-cycle studies that found real net removal efficiency ranging from 85.4% and 93.1% at Climeworks' actual plants to a modelled 9%-97% range driven almost entirely by how clean the plant's own energy supply is. Current costs ($600-800/tonne for solid sorbent, $400-600/tonne for liquid solvent, against the US DOE's $100/tonne-by-2032 target) are set against Puro.earth's December 2025 approval as an ICVCM Core Carbon Principles-eligible registry, and Japan Airlines' September 2026 purchase of Climeworks DAC credits alongside a separate CORSIA-oriented portfolio - a deal the video is careful not to read as proof that DAC itself is CORSIA-eligible.

It closes on US federal funding's own whiplash: the Department of Energy's $3.5 billion Bipartisan Infrastructure Law commitment to Regional DAC Hubs, roughly $8 billion in clean-energy grant cancellations in autumn 2025 that hit at least ten DAC Hubs awards, and April 2026's partial restoration of $1.2 billion for two of the programme's largest projects.

This video draws a conditional conclusion: direct air capture is not a trick, and the chemistry and storage are real and dated. It is not yet a solved industry, and nothing in its sources supports using a purchased removal credit as a substitute for cutting the emission at the source.

Educational documentary. Not financial or investment advice.

In these topics

Chapters

  1. A machine that breathes in pollution
  2. Why carbon dioxide is hard to catch from air
  3. Two chemistries: liquid solvent and solid sorbent
  4. From ETH Zurich lab to Hinwil's first commercial plant
  5. Orca and Mammoth: Iceland's basalt storage bet
  6. Mammoth's gap between promise and performance
  7. Stratos and the Texas scale-up, delayed
  8. Where the carbon actually goes
  9. Gross tonnes captured vs net emissions removed
  10. What a tonne costs today
  11. Verifying the claim: standards and buyers
  12. Funding politics: hubs built, hubs cut
  13. What machines can and can't undo

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Sources and credits

Photo credits (Wikimedia Commons)

Primary sources

  • Carbon Engineering / 1PointFive, 'Direct Air Capture' technical materials, carbonengineering.com; cross-confirmed via University of Waterloo Climate Institute DAC brief, May 2025 - liquid-solvent process, ~900C calciner.
  • Climeworks technical materials; Deutz & Bardow, 'Life-cycle assessment of an industrial direct air capture process based on temperature-vacuum swing adsorption', Nature Energy 6, 203-213, published February 2021 - solid-sorbent process, ~100C regeneration; Hinwil 85.4% / Hellisheiði 93.1% net removal efficiency.
  • Climeworks, 'Our journey', climeworks.com/journey (returns 403 to automated fetch; facts cross-confirmed independently); Jan Wurzbacher, 'Capturing CO2 from Air', TU Dresden Herbstworkshop ESS 2017 conference paper - 2009 ETH Zurich spin-off founding; 2017 Hinwil plant, first commercial DAC facility.
  • Carbfix, 'The world's largest direct air capture and CO2 storage plant is on[line]', carbfix.com, 2021; Chemical Processing, 2021 report on Orca's startup - Orca, 8 September 2021, 4,000 tonnes/year, basalt mineralisation.
  • Climeworks plant materials; gasworld and Energy Connects 2026 reporting - Mammoth, May 2024, stated design capacity up to 36,000 tonnes/year.
  • Energy Connects, 'Carbon removal pioneer Climeworks increases CO2 capture sixfold', September 2026 (direct fetch, verbatim); cross-confirmed by gasworld, Carbon Pulse, ESG Today - Mammoth H1 2026 net removal (675t) vs H1 2025 (119t), running costs down >50%, Jan Wurzbacher quote.
  • DecarbonFuse, 'Stratos DAC delay: inside the holdup at the world's largest carbon capture plant', 2025-2026; cross-confirmed via E&E News - Stratos, Ector County TX, 500,000 tonnes/year design, mid-2025 to end-2025 to Q2-2026 slips, non-process-component issue.
  • Occidental press release (oxy.com, May 2025); cross-confirmed via JPT/SPE, carboncredits.com, The Energy Year - South Texas DAC Hub, King Ranch/Kleberg County, XRG considering up to $500 million.
  • Carbon180, 'DOE Rescinds DAC Hubs Funding' (direct fetch, verbatim); DecarbonFuse, 'DOE Restores $1.2B for DAC Hubs and 5 Hydrogen Projects', April 2026; cross-confirmed via PGJ Online, CarbonCredits.com - $3.5bn Bipartisan Infrastructure Law commitment; ~$8bn cuts including at least 10 DAC awards, autumn 2025; $1.2bn restored April 2026 for Project Cypress and the South Texas DAC Hub.
  • Terlouw, Treyer, Bauer & Mazzotti (Paul Scherrer Institute / ETH Zurich), Environmental Science & Technology, 5 August 2021 - net removal efficiency 9%-97% across 8 countries, driven by energy-source carbon intensity.
  • RSC, Energy & Environmental Science, 2025, article d5ee01752a - CO2-enhanced-oil-recovery full-lifecycle carbon accounting; projects turn carbon-positive over the reservoir's lifetime, with emitted CO2 exceeding stored CO2 by 3x or more in several cases.
  • Live in the Future, 'Direct Air Capture Cost', published 11 March 2026 (direct fetch, verbatim) - cost per tonne by chemistry; DOE 'Carbon Negative Shot' $100/tonne-by-2032 target.
  • Puro.earth, 'Puro.earth receives ICVCM approval as eligible carbon crediting programme', 11 December 2025; cross-confirmed via ESG News, Carbon Pulse, Carbon Herald - ICVCM Core Carbon Principles-eligible approval, 8th programme, Puro.earth Standard v4.2.
  • Climeworks news page, 18 September 2026 (returns 403 to automated fetch); cross-confirmed via Japan Airlines press release (press.jal.co.jp, September 2026) and CarbonCredits.com - JAL/Climeworks Solutions CORSIA-oriented portfolio purchase plus separate DAC credit purchase.

Not regulated financial advice.