Carbon da aka kunna ya ƙunshi kayan carbonaceous da aka samu daga gawayi. Ana samar da carbon da aka kunna ta hanyar pyrolysis na kayan halitta na asalin shuka. Waɗannan kayan sun haɗa da gawayi, bawo na kwakwa da itace, bagashin rake, ƙoshin waken soya da taƙaice (Dias et al., 2007; Paraskeva et al., 2008). ...
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