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A new University of Michigan-led international study finds that fruits and vegetables grown in urban farms and gardens have a carbon footprint that is, on average, six times greater than conventionally grown produce.However, a few city-grown crops equaled or outperformed conventional agriculture under certain conditions.Tomatoes grown in the soil of open-air urban plots had a lower carbon intensity than tomatoes grown in conventional greenhouses, while the emissions difference between conventional and urban agriculture vanished for air-freighted crops like asparagus.“The exceptions revealed by our study suggest that urban agriculture practitioners can reduce their climate impacts by cultivating crops that are typically greenhouse-grown or air-freighted, in addition to making changes in site design and management,” said study co-lead author Jason Hawes, a doctoral student at the School for Environment and Sustainability.“Urban agriculture offers a variety of social, nutritional an

United statesUnited kingdomFrance generalNew yorkDave brennerNevin cohenBenjamin goldsteinJoshua newellJason hawesCity university of new yorkUniversity of kentSchool of environmentUniversity of michiganFrench national research agencySchool for environmentMcgill university