Climate Change (AQA GCSE Geography): Model Answers
📚 Model Answers
Outline one reason why the concentration of carbon dioxide in the atmosphere has changed over time. [2 marks]
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It has changed over time because people are cutting down trees, leading to an increase in CO2 levels instead of a decrease. This happens because trees absorb CO2 and release oxygen, so removing them results in higher CO2 concentrations in the atmosphere.
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Examiners Comment:
Deforestation is again identified here (although the technical term is not given) and there is clear development of how this leads to an increase in carbon dioxide in the atmosphere: [2 marks]