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9 marksHuman Impact on the Environment

CSEC Biology · May/June 2009 · Paper 2 · Question 5(b)(i)

Sometimes human activity abnormally affects natural cycles. Suggest TWO ways in which human activity contributes to an abnormal rise in levels of atmospheric carbon dioxide.

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Other parts of this question

  1. 5(a)Using a diagram, illustrate how any THREE named processes are involved in the recycling of carbon in nature.[6 marks]
  2. 5(b)(ii)Suggest ONE likely consequence of abnormally high carbon dioxide levels on ecosystems.[9 marks]
  3. 5(b)(iii)Suggest TWO ways in which carbon dioxide levels can be controlled.[9 marks]

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