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United States Department of Agriculture

Agricultural Research Service

ARS Photo Library


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Image Number K8674-1

An aerial view of the two CO²-gradient tunnels. In the tunnel on the left, plants grow under present-day to ice age CO² concentrations, while those in the tunnel on the right grow under CO² levels of today up to those predicted for 2050.

Photo by Scott Bauer.



640 pixels wide: (k8674-1.jpg)




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Last Modified: 5/23/2006
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