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Which activity would best keep the world's oxygen supply from decreasing? A. Planting trees in forests that have been harmed B. Changing jungles into farmland C. Cutting down forests to sell wood D. Clearing trees from areas near rivers

User Ely
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2 Answers

7 votes
a would be your answer
User Doug Wolfgram
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A. Planting trees in forests that have been harmed
User Pablo Boswell
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