does corn ferment
5. To produce ethanol in the US, corn is fermented, whereas in Brazil sugarcane is fermented. The fermentation process is highly CO2 intensive, i.e., it creates a lot of carbon dioxide.. To produce ethanol in the US, corn is fermented, whereas in Brazil sugarcane is fermented. The fermentation process is highly CO2 intensive, i.e., it creates a lot of carbon dioxide.