In this Monday, July 6, 2009 picture, Lowell Machart, the maintenance supervisor at the Grand Forks Human Nutrition Research Center, checks the watering system that he rigged up for watering the second floor patio planters 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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