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Charcoal or other lignites resemble biochar in many ways: water retention, habitat for micro-organisms, ... but they have a HUGE problem: they contain PAHs (Polycyclic Aromatic Hydrocarbons) which are carcinogenic POLLUTANTS. Installed in the pores of the coal, tars are formidable molecules that can be extremely resistant. More information on PAHs: https://www.cancer-environnement.fr/f... To order biochar, click here: https://www.perma-biochar.com/ More information on our websites: https://www.permaferme.be/perma-ferme... Follow us on social networks: facebook.com/ponceret instagram.com/permafermeduponceret linkedin.com/company/ponceret