It can store in the ground for long periods of time. That's the thing. It will stay there as long as we maintain it, and that's part of the challenge. Once we increase it to a certain point, it will stay there for quite a while, unless there's some sort of degradation process that occurs.
That's the nice thing about carbon sequestration in agricultural soils: It gets it into the soil and it can stay there for a very long time. They can do radiocarbon dating and they find carbon molecules that are hundreds or thousands of years old in the soil, so there's a long-term reservoir capacity in the soil. Getting that up a bit is possible with management. It takes a while, but it sequesters and stores for the long term.