ABSTRACT
Biochar is charcoal placed in soil for both soil and climate change improvement through carbon dioxide removal (CDR). Most of this chapter is on the latter biochar attribute-an atmospheric bene‹t. Biochar is the only CDR option where the carbon dioxide (transformed to char) is placed in soil. For biochar alone, the atmospheric CO2 has had two prior stages: a photosynthesis stage producing biomass and a pyrolysis stage producing charcoal (WSU, 2012). This chapter cannot discuss either of these in depth, although there is information in the following on both.
