What percentage of the world's electricity is provided by coal?
A) about 60%
B) about 50%
C) about 40%
D) about 30%
Correct Answer:
Verified
Q19: What has the highest net energy ratio
Q20: What is net energy?
A) It is the total
Q21: Which of the following is/are liquefied petroleum
Q22: How does natural gas compare to coal?
A) Natural
Q23: What is characteristic of both oil shale
Q25: In how many years will global coal
Q26: Which of the following is NOT contained
Q27: Which list shows the stages of coal
Q28: Which pair of countries has the largest
Q29: What comprises 50 to 90% of the
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