Which of following energy sources is the cleanest?
A) coal
B) oil
C) gas
D) oil shale
Correct Answer:
Verified
Q56: Approximately what was the population doubling time
Q57: How much of the global river sediment
Q58: The point at which global oil production
Q59: The world population first doubled approximately _
Q60: The main ingredient of natural gas is
A)nitrous
Q62: The burning of hydrogen produces
A)carbon.
B)water.
C)uranium.
D)helium.
Q63: The so-called "mountaintop removal" approach is used
Q64: _ saw the greatest increase in oil
Q65: Which of the following has the highest
Q66: Which region accounts for nearly half of
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