Contact: Jim Erickson
University of Michigan
Caption: An aerial view of the 38-acre experimental forest in Wisconsin where U-M researchers and their colleagues continuously exposed birch, aspen and maple trees to elevated levels of carbon dioxide and ozone gas from 1997 through 2008.
Credit: David Karnosky, Michigan Technological University
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Related news release: U-M ecologist: Future forests may soak up more carbon dioxide than previously believed