Match column A with B B A 16. Depletion of ozone layer 17. Global warming 18. Acid rain 19. Land pollution 20. Water pollution 21. Air pollution a. contamination of water b. contamination of air due to smoke c. contamination of land or dirty land d. rain water containing very high acid e. gradual increase of temperature of air f. destruction of the ozone layer due to chlorofluorocarbon
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16. Depletion of ozone layer
•F.destruction of the ozone layer due to chlorofluorocarbon
17. Global warming
•E.gradual increase of temperature of air
18. Acid rain
•D.rain water containing very high acid
19. Land pollution
•C.contamination of land or dirty land
20. Water pollution
•A.contamination of water
21. Air pollution
•B.contamination of air due to smoke
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