Examine the clues and answer the question based on the evidence.
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Level 1 Mission:Solve the mystery
Analyze scientific clues like ice cores and tree rings to solve mysteries about the Earth's climate history.
🧠🧠Logical Reasoning
Trapped Bubbles
Dust Layers
Oxygen Isotopes
What does the high CO2 concentration in the bubbles suggest about the past climate?
Hint: CO2 is a greenhouse gas that traps heat.