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United States Department of Agriculture

Agricultural Research Service

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Image Number D1464-5

Technician Sue Wise and microbiologist Vince Varel use a gas chromatograph to measure the amount of methane, a greenhouse gas, in manure from cattle fed wet distiller’s grains.


Photo by Stephen Ausmus.

640 pixels wide: (d1464-5.jpg)

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Last Modified: 8/12/2016
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