Paul Greenberg is being applauded in the media for his new book “Four Fish” (see the New York Times Book Review!), but most people don’t know that he is a radical urban gardener. His New York City apartment in a high-rise building is only a few blocks from Ground Zero – an area Paul believes should have more green space – particularly of the kitchen garden variety. To prove his point and to help feed his family, Paul planted a kitchen garden on his shady apartment terrace. He calls it Ground Zero Garden. Parent Earth made these videos to show how he gardens on the size- and light-challenged site as he strives for a diversified crop and – as he says – “salad self-sufficiency.” Paul Greenberg’s 3 year-old son helps – sort of.