How I Built This with Guy Raz

Back to the Roots: Nikhil Arora and Alejandro Velez

In 2009, Berkeley seniors Nikhil Arora and Alejandro Velez started to geek out over something they'd heard in a lecture: you can grow a healthy crop of mushrooms on used coffee grounds. Intrigued by the business potential, the pair set aside jobs in finance and consulting and became urban farmers: salvaging leaky bags of coffee grounds, planting mushroom…