Another way to capture and store CO2, is with devices. The leading company in carbon capture and storage, CanmetENERGY, has ways to store CO2 underground in geologically safe storage spaces. Porous rock formations, old coal and oil mines, and coal bed that can't be mined, are all short term storages.And for the long term, CO2 can be stored in saline aquifers. These are large pockets deep beneath the earth's crust.