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    Environmental Science
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    Environment Study Set 1
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    Exam 18: Global Climate Change
  5. Question
    Recent Evidence from Polar Ice Core Analysis Shows That, Until
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Recent Evidence from Polar Ice Core Analysis Shows That, Until

Question 45

Question 45

Multiple Choice

Recent evidence from polar ice core analysis shows that, until now, carbon dioxide levels have never exceeded _______________ ppm in the last 800,000 years.


A) 300
B) 25
C) 1000
D) 200
E) 500

Correct Answer:

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