Question:
Global warming is caused by:
AIncreased level of nitric oxide
BDecreasing oxygen
CIncreased level of carbon dioxide
DIncreased level of hydrogen sulphide
Answer:
C. Increased level of carbon dioxide
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Question:
AIncreased level of nitric oxide
BDecreasing oxygen
CIncreased level of carbon dioxide
DIncreased level of hydrogen sulphide
Answer:
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