Urban agriculture is rising steadily in popularity in the United States and Canada - there are stories in the popular press, it has an increasingly central place in the growing local food movement, and there is a palpable interest in changing cities to foster both healthier residents and more sustainable communities. The most popular form of urban agriculture, community gardening, contributes significantly to developing social connections, building capacity, and empowering communities in urban neighborhoods. Older, industrial cities such as Cleveland, Detroit, and Buffalo, with their drastic loss of population and their acres of vacant land, are emerging as centers for urban agriculture initiatives - in essence, becoming laboratories for the future role of urban food production in the postindustrial city. Because urban agriculture entails the use of urban land, it has implications for urban land-use planning, which is controlled and regulated by municipal governments and planning agencies. This PAS Report provides authoritative guidance for dealing with the implications of this cutting-edge practice that is changing our cities forever.