CBSE Class 12 Biology Environmental Issues Worksheet Set B

CBSE Class 12 Biology Environmental Issues (2). CBSE issues sample papers every year for students for class 12 board exams. Students should solve the CBSE issued sample papers to understand the pattern of the question paper which will come in class 12 board exams this year. The sample papers have been provided with marking scheme. It’s always recommended to practice as many CBSE sample papers as possible before the board examinations. Sample papers should be always practiced in examination condition at home or school and the student should show the answers to teachers for checking or compare with the answers provided. Students can download the sample papers in pdf format free and score better marks in examinations. Refer to other links too for latest sample papers.

1 In which year was the Air (Prevention and Control of Pollution) Act amended to include noise as air pollution.

2 Name the city in our country where the entire public road transport runs on CNG.

3 What is cultural eutrophication?

4 What is the raw material for polyblend?

5 What is an algal bloom?

6 What is the best solution for the treatment of electronic wastes?

7 What is the main idea behind “Joint Forest Management Concept” introduced by the Government of India?

8 What do you understand by Snow-blindness?

9 DDT content in the water of a lake that supplies drinking water to the near by villages, is found to be 0.003ppm.The kingfishers of that area are reported to have 2ppm of DDT. Why has the concentration increased in these birds? What harm will this cause to the bird population? Name the phenomenon.

10 Thermal power plants are inevitable in an industrial and densely populated country like ours. What harm do they do to the environment? Also mention any precaution that could be taken to save our environment.

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