Data from Mauna Loa show that CO2 levels since 1958 have
A) Risen steadily
B) Risen steadily, except for declines in the northern summer
C) Risen and fallen irregularly by decades
D) Changed little
E) Declined dramatically in recent years

Name: Data from Mauna Loa show that CO2 levels since 1958 have A) Risen steadily B) Risen steadily, except for declines in the northern summer C) Risen and fallen irregularly by decades D) Changed little E) Declined dramatically in recent years
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Question

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The Answer is B

Data from Mauna Loa Show That CO2 Levels Since 1958