Environmental Sciences Past Paper 2021

Q. No. 2. Define risk analysis. Discuss the four steps of risk analysis used by EPA. (20)

Q. No. 3. How can biotechnology, bioengineering and the increasing use of genetically modified organisms help us to deal with increasing food demands. (20)

Q. No. 4. How will you define Biodiversity? What is meant by the instrumental and intrinsic value of species? Why biodiversity is decreasing? Discuss different factors of biodiversity loss. (20)

Q. No. 5. 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? (20)

Q. No. 6. Discuss the Montreal Protocol and its subsequent amendments. (20)

Q. No. 7. Define Eutrophication. Explain the difference between natural and cultural eutrophication. Discuss the methods of combating Eutrophication. (20)

Q. No. 8. Write notes on any TWO of the following: (10 marks each) (20)
(i) Carrying capacity
(ii) GIS
(iii) E-waste

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