Biology, 07.10.2020 14:01 hannahgrace325

The graph shows data from ice cores. What has happened to carbon dioxide levels over time?
Atmospheric CO, (ppm)
Atmospheric Carbon Dioxide
350 from Law Dome Ice Cores
340
330
320
310-
300
290
280
1000
1200
1800
2000
1400 1600
Year (AD)
A. They have increased dramatically recently
B. They have gone up and down with no general trend.
C. They have decreased dramatically recently.
D. They have remained flat and steady.
Apex

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The graph shows data from ice cores. What has happened to carbon dioxide levels over time?
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