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Biology · May / June 2020 · Paper 11 · Question 32

5090Effects of humans on ecosystems

Areas of tropical rainforests are often cut down and cleared. After cutting down the trees, the areas are normally burnt. What are the effects of this activity?

  1. Aatmospheric carbon dioxide: decreases; number and variety of species: decreases; soil stability: increases
  2. Batmospheric carbon dioxide: decreases; number and variety of species: increases; soil stability: decreases
  3. Catmospheric carbon dioxide: increases; number and variety of species: decreases; soil stability: decreases
  4. Datmospheric carbon dioxide: increases; number and variety of species: decreases; soil stability: increases

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Correct answer: C. atmospheric carbon dioxide: increases; number and variety of species: decreases; soil stability: decreases

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