Which of the following is made by chemical processing of animal fat or vegetable oil?
A) Gasoline
B) Alcohol
C) Sugar cane gas
D) Biodiesel
E) Ethanol
Question 2
A problem with the use of biofuels is ________.
A) it has never been successfully produced
B) the United States has outlawed them
C) there is a food versus fuel debate
D) it has emitted more carbon dioxide than fossil fuels
E) it has never been successfully used in trucks