Environmentalhard · Past Paper
The 'Proxy Data' from ice cores allows scientists to reconstruct past atmospheric CO2 levels by analyzing:
AThe weight of the ice
BAir bubbles trapped in the ice
CThe color of the ice
DThe thickness of the ice layers
✓ Correct Answer: B — Air bubbles trapped in the ice
Air bubbles trapped in glaciers act as tiny time capsules, preserving samples of the atmosphere from thousands of years ago.
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