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This is an archive of AGU's GeoSpace blog through 1 July 2020. New content about AGU research can be found on Eos and the AGU newsroom.

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12 December 2013

Rooting out carbon’s effect on plant growth

In 1988, scientists at the Tennessee Oak Ridge National Environmental Research Park planted a scattering of Sweetgum seedlings to fill a space equivalent to a running track. Nearly 10 years later, after the trees had matured, construction crews plopped four rings of 40-foot PVC pipes into the floor of the new deciduous forest. In 1998, two sets of pipes switched on and began blowing carbon dioxide into the trees’ air supply, non-stop for 12 years.

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