## 2 What Is Terrestrial Storage of Biomass (TSB)? TSB is a NET technology. The modern TSB movement is generally credited to [PERSON] (2008) [1]. However, [PERSON] and [PERSON] (2008) proposed wood sequestration as a solution to the global CO\({}_{2}\) problem at about the same time [2]. [PERSON] et al. (2013) estimated the world carbon availability for TSB based on practical constraints at 2.8 Gtc/yr, showing that TSB can scale to Gt/yr [3]. [PERSON] and [PERSON] (2022) have published a more recent article where they put forth seven TSB pit designs for different scenarios [4]. This article also includes examples of wood recovered intact after burial for hundreds or thousands of years for both wet and dry burial. [PERSON] and [PERSON] (2001) proposed the burial of crop residue [5]. [PERSON] and [PERSON] (2022) recently proposed tree leaves and switchgrass from carbon farming as feedstock for TSB [6]. [PERSON] and [PERSON] (1997) reported on the decomposition of wood in landfills [7], as did [PERSON] et al. (2008, 2015) [8; 9]. [PERSON] and [PERSON] investigated the decomposition of wood in aqueous laboratory studies, where the wood was \"inoculated\" with municipal waste [10]. However, one must be cautious about using these results to project the decomposition of wood slash in dry TSB pits without inoculation, since inoculation can accelerate decomposition and, in the laboratory studies, the wood was ground to a small size with a high surface-to-volume ratio. [PERSON] et al. (2018) published on the state of knowledge of wood waste decomposition in landfills as of 2018 [11]. Yet, after these previous studies, TSB has not received wide acceptance or proper attention. It was not mentioned in a 2018 review of NETs ([PERSON] et al. [12]), and was not a topic for discussion at COP27, held in November 2022 in Sharm El Sheikh, Egypt. Plants obtain all of their carbon from CO\({}_{2}\) in the air via photosynthesis. Water and nutrients are absorbed from the ground via the roots. During the normal Carbon Cycle, plants die and decompose, releasing their carbon back into the atmosphere as CO\({}_{2}\). Nutrients are released back into the soil. The key to permanent biomass carbon sequestration is to bury it in underground pits designed to mitigate decomposition. This can be achieved with the following:  
1. Applying sound chemical and geotechnical principles in the pit design. 2. Segregating the topsoil, where microbes, fungi, worms, etc., reside that use enzymes to \"catalyze\" the decomposition of dead plants. 3. Surrounding the biomass with low-permeability sterile clay, which starves it of the oxygen and water needed to support the chemistry of decomposition. 4. Using the excess clay from the excavated pit now occupied by biomass to form a peaked cap or roof above-ground to shed rainwater away from the pit. The clay plays several roles ([PERSON] (2023) [13]). The peaked cap provides a hydrostatic head that can contain a certain pressure of CO\({}_{2}\) and methane, and the surrounding clay can adsorb some CO\({}_{2}\) and methane. These pit design guidelines are described in further detail below. 3 Why Terrestrial Biomass Storage Should Be Considered a Preferred CO\({}_{2}\) Capture Technology  
Windmills and solar parks are examples of Category 1 technologies that reduce \"future\" emissions from the continued use of fossil fuels. A windmill or solar park built today will displace \"future\" emissions from coal- or natural gas-fired power plants generating an equivalent amount of electricity. However, they will not remove CO\({}_{2}\) \"already\" in the atmosphere, which is already too high, leading to global warming. Terrestrial Storage of Biomass (TSB) is one of a few NETs that have been identified. Of those, TSB offers a unique combination of being simple, natural, carbon and energy efficient, and low-cost. It offers a very competitive life cycle analysis (LCA) with very little emissions associated with its implementation.