Cities face many environmental challenges, including air and water quality issues, lack of sufficient green space, excess heat capture, polluted stormwater runoff and lack of ecological biodiversity. Urban agriculture presents a unique opportunity to utilize vacant or idle land and rooftops throughout cities for the production of healthy, pesticide-free food. Adding green spaces to a neighborhood, including community gardens and urban farms, is known to provide a number of social, health, economic and environmental benefits. Unfortunately, most studies have neglected to analyze the potential contributions of urban agriculture to improvement of ecological sustainability in cities. This study used a multi-pronged approach to examine the environmental benefits of urban agriculture on unused, vacant real estate or rooftops as compared to the alternative of leaving the land or space in its current state.