In this Monday, July 6, 2009 picture, Kay Keehr, one of 21 Grand Forks Human Nutrition Research Center employees with a patio garden patch, holds a rubber rat she found in her planter in Grand Forks, N.D. The idea for flowers and vittles on the roof was cultivated by Tom Vilsack, the U.S. secretary of agriculture, who sent a note around to all USDA offices urging that they find ways to "green" their buildings. (AP Photo/The Grand Forks Herald, John Stennes)
Read the article: ND research center going green
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