Abe Noe-Hays, director of research at the Vermont-based Rich Earth Institute, left, and Nancy Love, professor of civil and environmental engineering at the University of Michigan cut the ribbon to a men's bathroom with a special toilet at the University of Michigan engineering building, Tuesday, Jan. 24, 2017, in Ann Arbor, Mich. The toilet is part of a multi-state project researching the conversion of human urine into fertilizer. (AP Photo/Carlos Osorio)
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