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United States Department of Agriculture

Agricultural Research Service

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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.

640 pixels wide: (k5652-18.jpg)

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Last Modified: 8/14/2017
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