Which of the following sources of energy provides the preponderance of energy in much of the underdeveloped world?
A. Nuclear power
B. Human labor
C. Wind energy
D. Geothermal power
E. Fossil fuel
Answer: B. Human labor
Which of the following sources of energy provides the preponderance of energy in much of the underdeveloped world?
A. Nuclear power
B. Human labor
C. Wind energy
D. Geothermal power
E. Fossil fuel
Answer: B. Human labor