Adrienne Horne, Raisa Rubin, and Lawren Gable were in the middle of their Design Clinic final presentation when they suddenly stopped. One of them walked over to a cloth-covered lump on stage and dramatically whipped it off, magician style, to reveal a prototype plastic shredder. The audience laughed at first, but then it sank in that this prototype could have an enormous impact on the roadside trash in Panama, where, aside from being just plain ugly, it collects water and harbors disease-carry [...]