Final answer:
The main source of ethanol used in Brazil is sugarcane, which is efficiently fermented and distilled to produce biofuel. This process is favored in Brazil due to the country's ideal tropical climate for sugar cane cultivation.
Step-by-step explanation:
The main source of ethanol used in Brazil is sugarcane. Brazil is renowned for its large-scale ethanol production from sugarcane, which is facilitated by the country's tropical climate that is ideal for growing this crop. Ethanol, also known as ethyl alcohol, is a biofuel that can be produced by fermenting the sugars in sugarcane and then distilling the result. This form of ethanol is blended with gasoline to power vehicles, helping to reduce reliance on fossil fuels and pollutant emissions.
While ethanol can also be derived from other crops such as corn in the United States, the primary feedstock for ethanol production in Brazil remains sugarcane. Moreover, the production of bioethanol from sugarcane is more energy efficient as compared to the production from corn or other crops.