Editing IPCC:AR6/SRCCL/Chapter-2 (section)

==== 2.6.1.6 Enhanced weathering ====

<div id="section-2-6-1-6-enhanced-weathering-block-1"></div>

Weathering is the natural process of rock decomposition via chemical and physical processes in which CO <sub>2</sub> is removed from the atmosphere and converted to bicarbonates and/or carbonates (IPCC 2005 <sup>[[#fn:r1846|1846]]</sup> ). Formation of calcium carbonates in the soil provides a permanent sink for mineralised organic carbon (Manning 2008 <sup>[[#fn:r1847|1847]]</sup> ; Beerling et al. 2018 <sup>[[#fn:r1848|1848]]</sup> ). Mineral weathering can be enhanced through grinding up rock material to increase the surface area, and distributing it over land to provide carbon removals of 0.5–4.0 GtCO <sub>2</sub> yr <sup>–1</sup> ( ''medium confidence'' ) (Beerling et al. 2018 <sup>[[#fn:r1849|1849]]</sup> ; Lenton 2010 <sup>[[#fn:r1850|1850]]</sup> ; Smith et al. 2016a <sup>[[#fn:r1851|1851]]</sup> ; Taylor et al. 2016 <sup>[[#fn:r1852|1852]]</sup> ). While the geochemical potential is quite large, agreement on the technical potential is low due to a variety of unknown parameters and limits, such as rates of mineral extraction, grinding, delivery and challenges with scaling and deployment.

<div id="section-2-6-1-7-demand-management-in-the-food-sector-diet-change-waste-reduction"></div>

<span id="demand-management-in-the-food-sector-diet-change-waste-reduction"></span>