“…In addition, the agri-sector contributes to air quality contamination and the associated effects on the human health, and produces huge numbers of several waste types [12]. Olive mill wastes received huge attention due to the high waste volumes, mainly due to their toxicity and their negative impacts on the environment [19,20]. The oil extraction process produces huge seasonal quantities of olive by-products that require noteworthy attention because of their high organic content and significant toxicity due to the phenolic substances with extremely vital environmental issues [21][22][23][24][25].…”