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Evidence for climate change

Exam question

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Pollen in a mud core (illustrative values; % of pollen grains)
Depth / cm	Birch (cold-tolerant)	Oak (warmth-loving)	Grass
20	10	55	35
60	30	35	35
100	60	10	30

Explain how the pattern of pollen in the core provides evidence of past climate.

(4)

Total for this question: 4 marks

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