Economic and ecological models of ethanol and bioethanol production units from taro, starchy plants of the variety Colocasia esculenta and yam or oviala of the variety Dioscorea Alata: case of the district of northern Befandriana - Jocel, ANDRIANANATENAINA; Emilien, RAKOTOBE; Estelle, ZARAMANANA; Sidonic, RASOAMANJAKA; Eliana, LEHIMENA; Fabian, RAJESITERA; Emilienne, RASOANANDRASANA; Zozime, RASOLONJATOVO Martial (International Journal of Advance Research and Innovative Ideas In Education, 2025)