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Wednesday’s five stories span policy, preservation, forests, robotics, and agriculture — and the throughline is that carbon removal keeps getting more real, more diverse, and less dependent on any single approach or government. What We Covered Today#Canada Creates the First National CDR Procurement Program — While Washington cancels DAC hub funding, Ottawa launched a dedicated procurement program for carbon dioxide removal credits. The $7M CAD budget is modest. The mechanism isn’t. This is the first time any national government has directly purchased CDR credits — not tax credits, not subsidies, actual procurement. The signal to the market: sovereign demand exists. Watch for other governments to follow within 12 months. ...

If you told me a climate startup was using autonomous rovers and microwaves to turn mining waste into a carbon sink, I’d assume it was a pitch deck fever dream. But Arca Climate is actually doing it — and the pilot data is impressive. The Vancouver-based company, born from UBC research, is led by a team with serious geological credentials. Co-founder Greg Dipple has spent 20+ years at UBC studying ultramafic rocks — the magnesium-rich minerals that naturally pull CO₂ from the air and lock it away for thousands of years through mineral carbonation. Co-founders Peter Scheuermann and Bethany Ladd round out the leadership. ...

Every few months, another study adds a line to biochar’s already impressive resume. But this one is different — it’s not a single experiment, it’s the whole picture. A new meta-analysis published in Carbon Research, led by Mbezele Junior Yannick Ngaba, synthesized 78 peer-reviewed studies from across the globe to quantify biochar’s impact on agricultural greenhouse gas emissions. The headline numbers: CO₂ emissions: reduced by 24%Methane (CH₄): reduced by up to 36%Nitrous oxide (N₂O): reduced by up to 39%And at high application rates (40 tonnes per hectare), the global warming potential reduction reached 83% on a 100-year timescale. ...

While the US is busy cancelling DAC hub funding, Canada just quietly did something no national government has done before: it launched a dedicated procurement program for carbon dioxide removal credits. The program, structured as a Request for Standing Offer, commits at least CAD $10 million (~$7M USD) to purchasing CDR credits generated within Canada. Federal departments can buy credits from five eligible pathways: direct air capture with carbon storage (DACCS), bioenergy with CCS (BECCS), biochar, biomass carbon removal and storage (BiCRS), and enhanced mineralization. Each CDR stream gets its own competitive process, evaluated on technical merit and price, with contracts running through March 31, 2029. ...

The name says it all. Ctrl-S — the keyboard shortcut for save — is a new company doing exactly that for the direct air capture sector: saving the work before it’s lost. Here’s the context. DAC investment has dropped more than 60% from its 2022 peak. The Trump administration cancelled tens of millions in federal DAC funding. Companies that raised on the 2021-2022 climate hype cycle are running out of runway, and when a deeptech startup dies, its IP, experimental data, and hard-won engineering knowledge often die with it. Papers in drawers. Lab notebooks in storage units. Sorbent formulations that took years to develop, gone. ...

Everyone talks about trees when they talk about forest carbon. But the real story is underground. A new study published in Science by researchers at Lund University and Stanford finds that old-growth forests in Sweden store 72% more carbon per acre than managed forests — even when you give managed forests credit for the carbon locked in harvested wood products like lumber and furniture. Without that generous credit? The gap widens to 83%. ...

Tuesday’s lineup hit five stories across three continents — a potential billion-dollar CDR contract, European infrastructure that’s actually being designed properly, two different flavors of DAC innovation, and a Swiss rodent that might outperform your favorite carbon removal startup. What We Covered Today#Microsoft’s CDR Bet: The Vaulted Deep Deal Could Be Worth ~$1B — Microsoft agreed to store 4.9 million tonnes of CO₂ with Houston-based Vaulted Deep. That’s more than the entire global CDR industry (excluding forestry) removed in 2023. The estimated price tag: roughly $1 billion. While the federal government freezes DAC hub funding, Microsoft is single-handedly creating a market. Impressive and deeply concerning in equal measure — one company’s climate commitment shouldn’t have to substitute for industrial policy. ...

The Weekly State of CDR — March 24, 2026#Infrastructure is being built. But the delivery gap is growing faster than procurement. The Gigaton Tracker#MetricValueSpent on CO₂ removal$11.5BCO₂ sold44.3 MtCO₂ delivered~1.2 Mt (2.7%)Active purchasers1,023Active suppliers735Target10 Gt/year by 2050The gap: 1.2 Mt delivered vs. 10 Gt target = 0.012% of the way there. Reaching the floor requires 35x acceleration over 24 years. The industry has built an enormous procurement apparatus. It has not built removal capacity yet. ...

A 30-kilogram rodent with orange teeth might be one of the most cost-effective carbon removal technologies on the planet. A new study published in Communications Earth & Environment provides the first detailed carbon accounting of beaver-modified wetlands — and the numbers are genuinely surprising. Researchers studied a stream system in northern Switzerland that beavers have been reshaping for over a decade. Their finding: if you scaled beaver-created wetlands across suitable habitats in Switzerland, they could offset 1.2–1.8% of the country’s annual carbon emissions. ...

Here’s the problem with most direct air capture: you spend enormous amounts of energy releasing the CO₂ you just captured. Heat the sorbent to 900°C (solid sorbents) or boil a solvent (liquid systems) — either way, the energy cost dominates the economics. That’s why DAC still costs $400–$1,000 per tonne. But what if you could release captured CO₂ by just… making the air humid? Researchers at Arizona State University, led by doctoral researcher Gayathri Yogaganeshan, have published new work explaining exactly why certain commercial polymers can capture CO₂ from dry air and release it when exposed to moisture. No heat. No pressure. Just wet/dry cycling. And for the first time, they’ve mapped the structural differences that make some materials dramatically better at it than others. ...