2. Class : 9 Sub: English 1 st paper Unit-5, Lesson-2 Time:40 m. Aim : 1. Students have to tell about air pollution. 2. Students have to understand how air is polluted. 3. Students have to indicate the source of air pollution. 4. Students have to discuss about prevention of air pollution. Aim : 1. Students have to tell about air pollution. 2. Students have to understand how air is polluted. 3. Students have to indicate the source of air pollution. 4. Students have to discuss about prevention of air pollution. Nishi Kanto Biswas ICT Teacher St. Paul’s High School

3. Where do fishes live in? In water

4. What is happening in this picture? Blowing air

5. Can we live without fresh air? No

6. Today we are going to know about air pollution

7. Pollution of air

8. Dust

9. construction

10. 1.poisonous exhaust from industrial plants

11. 2. brick kilns

12. 3. old or poorly serviced vehicles

13. 4. Dust from the roads and construction sites.

14. Prevention of air pollution 1. Less use of motor vehicles Jam of vehicles Less vehicles road

15. 2. Avoiding the use of vehicles older than 20 years Old carNew car

16. 3. Encouraging people to use compressed natural Gas(CNG) or Liquid Petroleum Gas LPG LPG fillingCNG filling

17. Group Work Group : A In Bangladesh dust from construction sites (a)___________ some of the major sources of air pollution. We can (b)___________ this type of pollution by (c)___________ less use of motor vehicles. Encouraging the people (d)___________ of vehicles older than 20 years. We can (e)_______the people to use CNG or LPG. reduceavoiding emission are use making encourage

18. Group : B Fill in the blanks using the words from the text 1. Toxic smokes from __________ plants. 2. Vehicles which are old and poorly _______. 3. Dust from the ________ fields. 4. In Bangladesh _________ from industrial plants are polluted the air. industrial Serviced vehicles Road and contruction Poisonous exhaust

19. Evaluation 1. What are the main causes of air pollution? Poisonous exhaust from industrial plants, brick kilns, dust of road and constructions sites. 2. What is the full meaning of CNG and LPG? CNG = Compressed Natural Gas LPG= Liquid Petroleum Gas.

20. Home Work Write a paragraph about “Air Pollution” in your own words.The paragraph is not more than 80 words.

21. Thank you everybody