trees need carbon dioxide to produce oxygen
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trees need carbon dioxide to produce oxygen
trees convert carbon dioxide to oxygen
trees need carbon dioxide
do trees turn carbon dioxide into oxygen
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do trees release carbon dioxide or oxygen
trees co2 to oxygen
do trees produce carbon dioxide
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trees convert co2 to oxygen
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trees take in co2 and release oxygen
trees need carbon dioxide to produce oxygen, trees convert carbon dioxide to oxygen, trees need carbon dioxide, do trees turn carbon dioxide into oxygen, do trees need carbon dioxide to grow, do trees release carbon dioxide or oxygen, trees co2 to oxygen, do trees produce carbon dioxide, do trees provide carbon dioxide, do trees give us carbon dioxide, trees convert co2 to oxygen, do trees turn co2 into oxygen, trees take in co2 and release oxygen