Greg Liu (at left) has spent the past five or six years working on ways to recycle plastics, and he and his team now believe they have found a solution to a growing global problem. Credit: Spencer Coppage for Virginia Tech. As an undergraduate student at Zhejiang University in eastern China, Greg Liu went with some of his classmates on a university-sponsored trip to tour a host of chemical industries within the area. The tour gave students pursuing degrees in chemical engineering an opportunity ...