The term "biodiesel" sounds organic. but actually, to make biodiesel requires a very costly and complicated conversion process. other than money, what other costs limit the use of biodiesel today? a) biodiesel is not readily available today. b) biodiesel can be made from free vegetable oil. c) the plants needed to create biodiesel take up valuable land that could be used for other purposes. d) the carbon dioxide created burning biodiesel is cancelled out by the carbon dioxide used growing the plants.