But only some types of carbon removal are actually effective—and these are largely not the kind that major companies are investing in. The handful of companies investing in more reliable carbon removal are mostly not doing so in conjunction with deep decarbonization, or the elimination of carbon emissions altogether. Carbon dioxide removal, or CDR, refers to efforts to capture CO 2 after it’s been emitted into the atmosphere and store it in rocks, land, ocean reservoirs, or human-made products. Currently, these durable techniques don’t work at scale: They account for just 0.1 percent of global carbon removal each year. Tech companies can fully decarbonize without offsets, so their emissions targets should not depend on carbon removal.