Nature

Here’s the reality check the CDR industry needs to sit with: a new paper in Communications Earth & Environment (Nature portfolio) finds that scaling negative emissions technologies to the gigatons could create serious resource and environmental bottlenecks — some of which nobody is planning for. The paper by Cobo, Galán-Martín, and Guillén-Gosálbez runs a comprehensive life-cycle assessment across the full CDR technology portfolio and identifies what the authors call “previously overlooked bottlenecks.” ...

A new study from Cornell’s Chuan Liao and colleagues, published in Nature Communications Sustainability, models what enhanced rock weathering (ERW) could actually achieve under realistic adoption scenarios. The headline: 700 million to 1.1 billion tonnes of CO₂ per year by 2100. That’s less than half the theoretical ceiling of 5 Gt/yr that earlier studies floated. But it’s still enormous — roughly 2–3% of current global emissions, achieved by spreading crushed basalt on existing farmland. ...

A new Nature paper maps the uncertainties of Enhanced Rock Weathering — from toxic trace elements to carbon tracking gaps. Here’s what it means for CDR.