1) Water pollution means the water in an area is not ……... a) strong b) loud c) dark d) clean 2) If a place has smog or the air is …….., it has air pollution. a) loud b) dark c) clean d) dusty 3) A place with a noise pollution problem can be very ……... a) loud b) dark c) clean d) dusty 4) Places that are never ……..have a light pollution problem. a) loud b) dark c) clean d) dusty

WE3. Unit 3A. (Vocabulary). Student book. p. 33, Exercise F

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