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Building materials that use cement, lime, clay, gypsum or geopolymers as binders will provide a permanent matrix for biochar C-sinks, as they are either reused in building materials or deposited in the soil. In the latter case, the same persistence curves apply as for soil application.
By incorporating biochar into concrete, up to 75% of the embedded carbon can, henceforth, be certified as permanent carbon sinks, with storage lasting over 1,000 years. In addition, temporary carbon sinks can be certified, which enables maximum utilisation of the carbon stored in the biochar by means of carbon sink certificates.
The new possibilities of the Global Biochar C-Sink Standard are applicable to all biochars certified according to the European Biochar Certificate (EBC) or the World Biochar Certificate (WBC). The certification of C-sinks fits easily and smoothly into the certification of biochar. All producers, processors and traders can benefit from this. |
