Environmental Sciences · 2021

CSS 2021 Environmental Science Paper

7 questions from this paper.

  1. Q1
    Define risk analysis. Discuss the four steps of risk analysis used by EPA.
    Past paper Risk Analysis 20 marks
  2. Q2
    How can biotechnology, bioengineering, and the increasing use of genetically modified organisms help us to deal with increasing food demands?
    Past paper Genetically Modified Organisms 20 marks
  3. Q3
    How will you define Biodiversity? What is meant by the instrumental and intrinsic value of species? Why is biodiversity decreasing? Discuss different factors of biodiversity loss.
    Past paper Biodiversity Value 20 marks
  4. Q4
    Explain the phenomenon of global warming. Which of the greenhouse gases are the most significant contributors to global warming? What steps could be taken to stabilize the greenhouse gas content of the atmosphere?
    Past paper Global Warming Mitigation 20 marks
  5. Q5
    Discuss the Montreal Protocol and its subsequent amendments.
    Past paper Montreal Protocol 20 marks
  6. Q6
    Define Eutrophication. Explain the difference between natural and cultural eutrophication. Discuss the methods of combating eutrophication.
    Past paper Eutrophication 20 marks
  7. Q7
    Write notes on any TWO of the following: (i) Carrying capacity; (ii) GIS; (iii) E-waste.
    Past paper E-Waste 20 marks

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