1) Trees help to clean the air by absorbing carbon dioxide and releasing oxygen. How do trees help to clean the air? a) By producing more carbon dioxide. b) By absorbing carbon dioxide and releasing oxygen. c) By creating noise pollution 2) Mayra recycles plastic, paper, glass and old clothes to create new things. Does she recycle only paper ? a) No, she doesn't. b) Yes, she does. 3) Do you use recycled bags? a) Yes, always. b) Sometimes. c) Never. 4) If John ________ trees in her garden , he _______ them daily a) plants - water b) plant - will waters c) plants - will water 5) You will help our environment when... a) you litter the rivers. b) you plant trees in your garden. c) you don't clean the streets. 6) If governments enforce stricter laws...... a) pollution levels will decrease. b) there will be less air pollution. c) the city will become polluted.

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