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United States Department of Agriculture

Agricultural Research Service

ARS Photo Library

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Image Number K5652-18

Near Phoenix, Arizona, scientists measure the growth of wheat surrounded by elevated levels of atmospheric carbon dioxide. the study, called Free Air Carbon Dioxide Enrichment (FACE), is to measure carbon dioxide's effect on plants. It is the largest experiment of this type ever undertaken.

Photo by Jack Dykinga.



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Last Modified: 5/23/2006