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

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

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