Ethanol is a controversial biofuel because it is still unclear how much carbon dioxide is emitted during the production and burning of ethanol compared to conventional gasoline.

Question

Quizplus · Accepted Answer

This statement is true. While ethanol is considered a renewable fuel source, there is debate about whether it actually produces fewer emissions than gasoline when the entire lifecycle of production, transportation, and burning is considered. While some studies have shown that ethanol can emit fewer greenhouse gases, others have found that the production and transportation of ethanol can result in emissions that are just as high or even higher than gasoline.

Ethanol Is a Controversial Biofuel Because It Is Still Unclear