Throughout Europe, and also in (21)___________ areas of the world such as India, China and parts of America, forests are (22) ________ destroyed. According to one (23)___________ , 90% of German forests will have vanished by the end of the century. This disaster is caused by (24)___________ pollution. Power stations and (25) ________ are mainly denounce- they emit gases to the air, which, after a series of (26) _________ changes, turn into toxic acids. These acids fall as” acid rain”, raising the acidity in the soil, in lake and in air to (27) __________ levels, and destroy not only trees (28)___________ also fish and other wildlife. 21. A. together B. others C. other D. another 22. A. only B. largely C. clearly D. nearly 23. A. prediction B. intention C. invention D. prevention 24. A. noise B. water C. air D. light 25. A. cars B. bicycles C. cyclists D. bicyclists 26. A. chemical B. physical C. beneficial D. manual 27. A. innocuous B. harmless C. dangerous D. safe 28. A. but B. and C. or D. however