CSS Environmental Sciences Past Paper 2022

Instructions specific to this paper

• Part-IT is to be attempted on the separate Answer Book.
• Auempt ONLY FOUR questions from Part-Il, All questions carry equal marks.
• All the parts (if any) of each question must be a11empted al one place instead of at different
• No page/ space be left blank between the answers. All blank page.� of Answer Book must be
• Extra attempt of auy question or any part of the question will not be c_onsidered

Questions

1. Q. 2

   Why are environmentalists arc interested in we�lands?Descril5e various mechanisms for sustainable management of wetlands in Pakistan.

2. Q. 3

   Write in detail the history and main features of the fndus Water Treaty with a special focus on its significance in the cun-ent scenario of water stress in Pakistan.

3. Q. 4

   What is anaerobic degradation? Describe-the four key stages in the anaerobic degradation of organic waste.

4. Q. 5

   What are che potential environmemal impacts of China Pakistan Economic Corridor (CPEC)?

5. Q. 6

   Jf the population of the top carnivores declines, what will happen to the landscape ecosystems?

6. Q. 7

   What i the ozone layer? E I?lain its depletion resulting from the atmospheric NO, H, OH, and Cl

7. Q. 8

   W.. rite short notes on any FOUR of the following: I. GTS and RS 2. Biodiversity loss 3. Atmospheric smog 4. Population 5. Air Pollution 6. Green House Gases

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.