If you think you've reduced your carbon footprint all you can, think again. By looking at the problem of landfills from two sides – not putting stuff in them and taking stuff out of them – a company founded in 2001 by then 19-year-old Tom Szaky has gone well beyond the blue recycling bins we all know and use (don't we?) to upcycling, the reuse of trash. It all started with worms and a Princeton Business Plan contest. Now his company, Terracycle <http://www.terracycle.net/>  boasts that it has collected almost 2 billion units of waste and manufactures 178 products using recycled bits and pieces. He has engaged children and nonprofits in collecting everything from candy wrappers to Huggies, and paid them almost $1 million for doing so. Back to the worms: While looking for an idea to enter into the business plan contest, Szaky was introduced to composting worms: They eat garbage and expel very rich fertilizer. That became his business plan: an organic fertilizer company. But in the course of years, it morphed into an overall "garbage in, good stuff out" plan. The company began to make things out of candy wrappers and e-waste, things like waste baskets, picture frames, toys, and tote bags.