History Rhymes: A Century of Crushed Rock Keeps Teaching the Same Lesson

Fri, 03 Jul 2026 08:00:00 +0000

Last week we published a long write-up of the first CDI Symposium, where a room of soil scientists picked apart the world’s most-measured enhanced-rock-weathering experiment and landed on an uncomfortable conclusion: the rock dissolves, but the expected carbon-removal signal often doesn’t show up — and whether it does depends heavily on the specific soil. Enhanced rock weathering (ERW), the symposium suggested, is not a universal climate fix but a context-dependent one, and measuring it honestly is the whole ballgame.

Five Years, One Field, and a Question That Won't Sit Still: What We Learned at the First CDI Symposium

Thu, 02 Jul 2026 08:00:00 +0000

Near the end of the first-ever Carbon Drawdown Initiative (CDI) Symposium, the man who paid for the whole thing stood up to thank everyone and said something you almost never hear from a project’s funder:

“It’s now five years ago since we literally spread the first ton of rock on the field… and I still cannot tell if we’ve done CDR since then. That drives me nuts. And it’s just one field.”

Field-Notes on Captain Drawdown's CDR Databases

History Rhymes: A Century of Crushed Rock Keeps Teaching the Same Lesson

Five Years, One Field, and a Question That Won't Sit Still: What We Learned at the First CDI Symposium