Grand Challenges in Urban Agriculture: Ecological and Social Approaches to Transformative Sustainability - Zimmerer, Karl S.; Bell, Martha G.; Chirisa, Innocent; Duvall, Chris S.; Egerer, Monika; Hung, Po-Yi; Lerner, Amy M.; Shackleton, Charlie; Ward, James David; Yacamán Ochoa, Carolina (Frontiers in Sustainable Food Systems, 2021)