This chart is a stacked horizontal bar showing CDR-attributable headcount across pathways on the vertical axis, with each bar segmented by business focus: pure-play companies whose entire reason for existing is CDR, divisions inside larger firms where CDR is one line of business, and ecosystem players who sell tools, verification, brokerage, or software into the space. Bar length is total attributed workers; the color split is where those workers actually sit. ...

Carbon Herald just published Wren Kicks Off Its 2026 Call For Proposals, Looking To Back Climate Solutions. Carbon Herald reports that Wren, a public benefit corporation, has launched its 2026 Call for Proposals aimed at backing climate solutions that can scale and deliver removals or reductions at competitive cost. The program is positioned to surface and support projects that align with Wren’s funding criteria, with emphasis on measurable impact. The outlet frames the call as part of Wren’s ongoing effort to channel philanthropic and corporate dollars into vetted climate work. Specifics on award sizes, deadlines, and eligible technology categories are outlined in the full article. ...

Captain Drawdown’s daily logbook on every CDR story, paper, and expert voice — so you don’t have to read them all. The consensus A new Nature Reviews Bioengineering synthesis, Genome engineering of plant photosynthesis for carbon sequestration, is being passed around CDR circles this week as evidence that engineered crops are a serious carbon removal pathway. Plant biologists, agtech investors, and a growing chorus on LinkedIn are treating Rubisco redesign, C4 retrofits, and improved electron transport as a route to gigatonne-scale drawdown. The framing: fix photosynthesis, fix the carbon budget. ...

Direct Air Capture (DAC) is the use of engineered equipment — fans, sorbents, solvents, or electrochemical cells — to separate carbon dioxide from ambient air, concentrate it, and hand it off to either permanent storage or industrial use. Unlike point-source capture at a power plant or cement kiln, DAC has no flue gas to draw from: it works against an atmospheric concentration of roughly 425 ppm, which is the central reason it is both energy-intensive and, when paired with geological storage, one of the most durable carbon dioxide removal (CDR) options available. For buyers and policymakers building portfolios with century-plus permanence, DAC sits alongside mineralization and bio-oil sequestration as a small-but-growing share of the durable removals market. ...

Carbon Herald just published Alberta Commits $50M To Industrial Decarbonization And Cleantech Projects. Carbon Herald reports that Emissions Reduction Alberta (ERA) has opened a new $50 million funding round under its annual Industrial Transformation Challenge. The program targets industrial decarbonization and cleantech projects across the province, aiming to support technologies that can cut emissions from heavy industry. ERA, funded through Alberta’s industrial carbon pricing system, has run similar competitive calls in prior years to back demonstration and scale-up projects. The new round invites applications from companies developing solutions relevant to Alberta’s industrial base, including oil and gas, petrochemicals, and other emissions-intensive sectors. ...

Captain Drawdown’s daily logbook on every CDR story, paper, and expert voice — so you don’t have to read them all. The story California Resources Corporation (CRC) injected the first molecules of CO2 into Carbon TerraVault I (CTV I) this week, opening the state’s first operational geologic storage project at the Elk Hills field in Kern County, as reported in California Launches First Operational Carbon Storage Project. It matters because California legislated SB 905 in 2022 to govern CO2 injection and has been waiting on a permitted, operating well ever since. Three years of statute, federal Class VI processing, county conditional use approvals, and reservoir characterization just collapsed into a single open valve. The continental storage map, which had Quest in Alberta and a handful of Gulf Coast projects, just added a West Coast node. ...

Today’s three stories point at one uncomfortable truth: the carbon dioxide removal industry is being asked to scale faster than its safeguards, its capital stacks, and its pathway diversity can support. The risk is not that nothing works. It is that we are loading durability promises onto systems whose failure modes we have not yet priced. The buffer pool problem is a time-machine problem In Captain Drawdown’s daily CDR Log #146, the focus is on buffer pools, the shared insurance accounts that nature-based projects contribute credits into so that reversals, fires, pests, drought, can be covered without breaking the promise to the buyer. When a forest burns, credits get retired from the buffer to make the atmosphere whole. ...

This chart is a stacked bar count of every company in the CDR Directory, grouped along the x-axis by removal pathway (direct air capture, enhanced weathering, biochar, ocean alkalinity, and so on), with each bar segmented by business focus: pure-play producers, brokers and marketplaces, and firms where CDR is a side business bolted onto a different core model. The total height tells you which pathways are crowded with company formation. The segment mix tells you something a raw count hides: whether a pathway’s apparent size is built on operators actually delivering tonnes, on intermediaries reselling them, or on incumbents whose CDR line is a minor adjunct. Two pathways with identical totals can have very different underlying economies once you see the split. ...

Carbon Herald just published Mantel And Wood Partner To Scale High-Temperature Carbon Capture. Carbon Herald reports that carbon capture developer Mantel has entered into a memorandum of understanding with engineering services firm Wood to accelerate the rollout of high-temperature carbon capture technology. The partnership pairs Mantel’s molten salt-based capture approach, which targets industrial heat applications, with Wood’s engineering and project delivery capabilities. The collaboration is positioned as a step toward commercial-scale deployment across hard-to-abate sectors. Specific project sites, capture volumes, and timelines were not detailed in the announcement covered by the outlet. ...

Captain Drawdown’s daily logbook on every CDR story, paper, and expert voice — so you don’t have to read them all. The critique “One mature tree takes up ~25 kg of CO₂/year, so 100 million trees will take up 2.5 MtCO₂. That’s a time machine that takes us back ~33 minutes in a year. Nature will not save us from fossil fuel CO₂.” That is David Ho (@davidho.bsky.social), and it is the cleanest attack on nature-based removal in circulation right now. ...