The energy return on energy invested (EROEI) for newly discovered oil fields was typically around 100:1 in 1940s and it has currently decreased to ________
A) 8:1
B) 75:1
C) 50:1
D) 25:1
E) 15:1
Correct Answer:
Verified
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A)
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Q47: The major iron ore minerals are _.
A)
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A) quartz and
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A) gypsum
B)
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A) oxides
B) pegmatites
C)
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