After years of investigating biochar, which promoters have touted as a potential climate change fix, DeSmog is releasing its findings on the science, claims, and controversy surrounding this approach to sequestering carbon.
Biochar is the product of plant or animal products (biomass) undergoing pyrolysis, a high-heat chemical reaction, to convert the carbon-containing biomass to a stable, non-decomposing form of charcoal. Introduced to mainstream audiences in a Time Magazine article from December 2008, biochar as a climate geoengineering technology has hit a number of peaks and valleys since then. In that time, its best chances at reaching commercial scales so far have failed, according to a new DeSmog report, Biochar: Climate Change Solution or False Hope?
Biochar's failure to date is due to a number of reasons, such as the lack of scientific consensus surrounding its ability to sequester carbon indefinitely, the vast amounts of land needed to produce biochar at a large enough scale to affect the climate, and the lack of legislative or regulatory frameworks required for investment in commercial-level production.