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Earth Sciences 18 Online
OpenStudy (peterg2001):

Plants depend on the atmosphere for the largest source of: phosphorus carbon weed control nitrogen @HelpBlahBlahBlah @Kidthatbro8

OpenStudy (kidthatbro8):

i'm not entirely sure, but from common sense i know that trees absorb carbon and put out oxygen, so from that i would guess B. i don't really know for sure, though Σ(T▽T;)

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