Their business is really mushrooming.

• Position: Green Jobs - Back to the Roots - Brief article

Ever wonder what happens to the coffee rounds used to brew the 146 billion cups of coffee Americans drink annually? A lot of them wind up in landfills. But Alejandro Velez, 24, and Nikhil Arora, 25, have found a way to put some of the discarded grounds to use: Their company, Back to the Roots (BTTR), sells kits for growing gourmet oyster mushrooms in coffee grounds at home. The two got the idea in 2009, when their business school professor at the University of California, Berkeley, mentioned that women in Colombia grew mushrooms that way to fight malnutrition...