<iframe width="580" height="385" src="https://www.youtube.com/embed/akUhkGp_Vuk?hl=en" frameborder="0" allowfullscreen></iframe> <br>Today, Billy Polansky, the Executive Director of Columbia's Center for Urban Agriculture, takes us on a guided tour of this 1.3 acre urban farm that grows 19000 ... <br><a href="https://www.youtube.com/watch?v=akUhkGp_Vuk">source</a>