About a half of the United states energy comes from coal. Why could that be a problem?
A) Coal emits high CO2 concentrations.
B) Coal is very rare.
C) Coal is very expensive.
D) Coal is not found in the U.S., therefore we are dependent on foreign countries for our energy.
Answer: A
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What will be an ideal response?
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Answer the following statement true (T) or false (F)