Tom Szaky Terracycle At a Glance * Age: 29 * Headquarters: Trenton, N.J. * 2010 revenues: $13 million * www.terracycle.net Profile When Tom Szaky was a freshman at Princeton he hit upon the idea of using worm poop as an organic fertilizer. He borrowed money from family and friends and spent all his savings on a $20,000 "worm gin"—which can hold hundreds of thousands of the invertebrates—and dropped out of college. With a $2,000 angel investment from venture capitalist Suman Sinha, Szaky started packaging the fertilizer in used soda bottles and selling it out of his car to local gardening centers. In 2004 he convinced a buyer for Home Depot to take a flier on his fertilizer, which is also now available in Target and Wal-Mart. In addition to the ­fertilizer, Terracycle collects trash and turns it into bright, fun products, like messenger bags made out of used Capri Sun packages and trippy "urban art trash cans." The company donates 2 cents to charity for each waste item it ­recycles, raising $3.2 million so far.