CSS Environmental Sciences Past Paper 2021

Instructions specific to this paper

• Attempt ONLY FOUR questions from PART-II. ALL questions carry EQUAL marks.
• Carrying capacity

Questions

1. Q. 220 marks

   Define risk analysis. Discuss the four steps of risk analysis used by EPA.

2. Q. 320 marks

   How can biotechnology, bioengineering and the increasing use of genetically modified organisms help us to deal with increasing food demands.

3. Q. 420 marks

   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.

4. Q. 520 marks

   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?

5. Q. 620 marks

   Discuss the Montreal Protocol and its subsequent amendments.

6. Q. 720 marks

   Define Eutrophication. Explain the difference between natural and cultural eutrophication. Discuss the methods of combating Eutrophication.

7. Q. 820 marks

   Write notes on any TWO of the following: (10 marks each) (i) Carrying capacity (ii) GIS (iii) E-waste

Standard FPSC instructions

Printed on this and every CSS paper.

• Part-II is to be attempted on the separate Answer Book.
• All the parts (if any) of each question must be attempted at one place instead of at different places.
• Write Q. No. in the Answer Book in accordance with Q. No. in the question paper.
• No page/space be left blank between the answers. All the blank pages of the Answer Book must be crossed.
• Extra attempt of any question or any part of the attempted question will not be considered.