According to Stanford University News
Stanford’s Global Climate and Energy Project awards $9.3 million for energy research. One of the projects:
The pyrolysis-bioenergy-biochar pathway to carbon-negative energy.
Heating plant material slowly without oxygen – a process called pyrolysis – produces a carbon-rich material called biochar. Researchers will study the production of biochar for use as a soil amendment that stores carbon underground instead of allowing carbon dioxide to re-enter the atmosphere as the plant decomposes. Investigators: David Laird, Bruce Babcock, Robert Brown and Dermot Hayes (Iowa State University); David Zilberman (University of California, Berkeley).