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  • 05-05-2017
  • Biology
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Please help me with 10 11 and 12 ASAP

Please help me with 10 11 and 12 ASAP class=

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vocaloid55
vocaloid55 vocaloid55
  • 05-05-2017
Number 12: if people planted a lot more tress then the level of carbon dioxide would decrease because trees take in co2 and produce oxyen.
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