Soil can store gigatons of carbon, and Yard Stick wants to measure it all

When it comes to removing carbon dioxide from the atmosphere, one of the first questions is often: What should we do with it? Making new things is an obvious answer, though it’s still an expensive proposition. Stashing it underground is another, cheaper option; it usually involves compressing and injecting the gas into underground rock formations, kind of like oil drilling in reverse.
But when it comes to storing carbon underground, there’s another choice that’s even more straightforward: agricultural soils. Farming and ranching has the potential to store from 2 billion to 4 billion metric ton

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