Eventually, If Bioethanol Remains in Use, It Will Probably Be

Q13: Average energy use per person in the

Q14: Of these sources, which is responsible for

Q15: In the United States, the lowest cost

Q16: The proportion of the world's electricity that

Q17: A factor that helps prevent the widespread

Q19: Compact fluorescent light bulbs are more efficient

Q20: At present, the source of most electricity

Q21: Methane is the chief constituent of<br>A) natural

Q22: Fuel cells<br>A) store energy.<br>B) need regular recharging

Q23: An optimistic projection for 2100 suggests that