CDI Research

New Scientist highlighted a growing body of research suggesting that spreading crushed basalt on farmland could absorb up to 1 billion tonnes of CO₂. Field trials in Queensland, Australia, are among the latest to generate real data. Nations like Brazil are already deploying enhanced rock weathering (ERW) at scale, partly because crushed silicate rock also reduces fertiliser costs. Big number. Important caveat: “could” is doing a lot of work in that headline. ...

New research from Cornell University modelled the global adoption potential of enhanced rock weathering and landed on a striking number: 1.1 billion tonnes of CO₂ removed per year by 2100. That’s roughly 3% of current annual fossil fuel emissions — meaningful at planetary scale. The headline is exciting. The fine print is where the real story lives. What the Study Actually Shows The Cornell team did something most ERW projections skip: they modelled adoption rates rather than just theoretical capacity. Using historical data on how fast farmers adopt new practices (like irrigation), they estimated a range of 350 million to 750 million tonnes per year by 2050, scaling to 700M–1.1 Gt by 2100. ...