cut down, People should not __________ trees in protected forests., hunt, Some animals are in danger because people __________ them for sport., looks after, She __________ her little brother after school every day., pollute, Cars and factories __________ the air in big cities., protect, We must __________ wild animals and their habitats., recycle, Many families __________ paper, glass and plastic., save, Turn off the lights to __________ energy., throw away, Don’t __________ plastic bottles — recycle them!

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