Science

Three enhanced weathering papers landed on CDRXIV in close succession, and read together they give me the clearest snapshot I’ve had of where this pathway actually stands in late 2025. The Suhrhoff et al. systematic review — with a co-author list that reads like a who’s-who of the field — puts a median area-normalized CDR flux of 0.84 tCO₂ ha⁻¹ yr⁻¹ on the table and converges global technical potential at ~0.2–2 GtCO₂ yr⁻¹. Cobo and Guillén-Gosálbez then argue that if you take empirical (rather than theoretical) weathering rates seriously in a life-cycle assessment, inland deployments starting in 2030 face a median 11-year lag before net CDR turns positive. And Gholamahmadi et al. offer the first structured synthesis of how ERW changes the soil’s ability to hold and move water — with mixed results that complicate the “co-benefits” story. ...

Most biochar research runs for months, sometimes a year or two. Lab-scale experiments under controlled conditions, extrapolated to predictions about decades of performance. The data is useful, but the extrapolation introduces uncertainty that makes it hard to make confident claims about long-term carbon storage or soil remediation. A new study published in Biochar (Ma et al., 2026) breaks this pattern. Fourteen years of continuous field data, agricultural soils, real-world conditions. And the findings strengthen the case for biochar as a dual-benefit intervention: carbon sequestration and soil remediation simultaneously. ...

We first covered the Loc-Ness OAE trial when initial results emerged in March. Now the Woods Hole Oceanographic Institution team has presented detailed findings at the Ocean Sciences Meeting 2026, and the data is more complete. The picture is encouraging. The Experiment#The Loc-Ness project (named for its combination of Loring Air Force Base logistics and the Ness of monitoring) ran a six-day field trial in August 2025 in the Gulf of Maine. The setup: ...

Enhanced weathering might be the most promising CDR method you haven’t heard of. Here’s how spreading crushed rocks on farmland pulls CO₂ from the sky.