"Cool Planet is a technology company that is developing Engineered Biocarbon™ and hydrocarbon products to address three of the world’s largest markets: food, water, and energy, . Currently we are commercializing Cool Terra® an engineered biocarbon product that helps to improve soil health, as well as Cool Fauna™ for use in animal nutrition. Our Cool Terra® engineered biocarbon product sequesters carbon and creates value for the agriculture, water, and livestock industries."

Link

"If you add 18 to 20 tons of compost per hectare (2.2 acres) of land, only 1 ton of the carbon in the compost stays in the soil. As the compost decays into humus, the rest goes off into the atmosphere as carbon dioxide. With biochar, 10 to 20 percent of the carbon goes off as carbon dioxide after a decade or so but the rest is sequestered in the soil for hundreds if not thousands of years."

Link

Heck, Vera; Gerten, Dieter; Lucht, Wolfgang; Boysen, Lena R. (2015): Is extensive terrestrial carbon dioxide removal a ‘green’ form of geoengineering? A global modelling study. In Global and Planetary Change. DOI 10.1016/j.gloplacha.2015.12.008.

"As it is a plant-based CE option that extracts CO₂ from the atmosphere, it might be considered a ‘green’ CE method that moves the biosphere closer to its natural, i.e. pre-Neolithic, state. Here, we test this hypothesis by comparing the biogeochemical (water- and carbon-related) changes induced by biomass plantations compared to those induced by historical human land cover and land use change. Results indicate that large-scale biomass plantations would produce a biogeochemical shift in the terrestrial biosphere which is, in absolute terms, even larger than that already produced by historical land use change."

Link

Biofuelwatch (2015): Last-ditch climate option or wishful thinking? Bioenergy with Carbon Capture and Storage. With assistance of Almuth Ernsting, Oliver Munnion.

"The report looks in detail at the technical and economic viability of the technologies involved, at the credibility of the idea that large-scale BECCS could be carbon-negative, at the evidence regarding the reliability of carbon storage and at the greenhouse gas impacts of combining Carbon Capture and Storage with Enhanced Oil Recovery."

Link (pdf)