Over the next decade, thinning operations in the American West are set to extract large volumes of small-diameter, low-value wood from overstocked forests. Currently, there is no valuable use for this wood. Usual practices involve stacking it into slash piles on site, then either leaving it to decompose or burning it. In either case, the carbon stored in the slash is lost to the atmosphere. The CC Lab proposes storage in ‘vault'-like structures to delay the carbon's decomposition.