The production of biogas from the fermentation of waste materials is an example of? by Sunday | Dec 11 | Chemistry WAEC | 0 comments A. combustion B. incineration C. refining D. recycling Correct Answer: Option D D. recycling Users Also Read These:Print Materials Production Course MaterialTwo different materials, rubbed against each other…Fermentation is the?Ethanol is a product of fermentation of simple…Which of the following is not a product of…