Preindustrial People Had Little Effect on Atmospheric Carbon Levels

ScienceNOW Daily News
By Phil Berardelli
September 23, 2009

As the researchers report tomorrow in Nature, it was predominantly natural, a combination of vegetation buildup after the ice age and, more prominently, the slow reaction to this change by ocean chemistry. But humans, the team concluded, played a small part. "It's a much better picture than we previously had," says geochemist Edward Brook of Oregon State University, Corvallis.

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