New study:

Earth's capacity for storing CO₂ underground in pore space may be much less than expected

Storing captured CO₂ as a semi-liquid in the tiny pore spaces of sedimentary rock underground is widely considered to be one strategy for reducing global warming. CO₂ would be captured from industrial emissions (carbon capture and storage, CCS) and industrial direct air capture plants (direct air capture with pore space storage, DACPS).

Rock layers in sedimentary basins throughout the world have been widely estimated to have enough pore space to ultimately store a total of 10,000 to 40,000 gigatonnes. This far exceeds the 2,000 GtCO₂ that has been widely viewed as requiring storage by the year 2100 — suggesting there should be no concern about adequate future storage capacity.

But a new GIS modelling study . . . Read more

New study:

Option-rich CDR pathway may be best due to uncertain future

Planning for carbon dioxide removal (CDR) isn’t just a matter of picking the right technology—it’s about navigating a maze of unknowns. A new study published in April 2025 in "Environmental Research Letters" by Quirina Rodriguez Mendez and colleagues offers perhaps the clearest framework yet for how to think about . . . Read more