Which of the following sources of energy dominates the world's energy usage?
A. Hydroelectric power
B. Petroleum products
C. Wind energy
D. Geothermal power
E. Nuclear power
Answer: B. Petroleum products
Which of the following sources of energy dominates the world's energy usage?
A. Hydroelectric power
B. Petroleum products
C. Wind energy
D. Geothermal power
E. Nuclear power
Answer: B. Petroleum products