Connections: Careful How You Calculate Urban Agriculture's Carbon Intensity.

A peer-reviewed paper published in Nature Cities claims that urban agriculture has six times the carbon intensity of conventional agriculture. The paper is based on survey results from gardens in France, Germany, Poland, the United Kingdom, and the U.S. The authors used a model called Ecoinvent to calculate emissions, but the assumptions in the model were not shared. The study found that urban farms had lower emissions than traditional agriculture within three years of establishment, while individual and collective urban gardens had higher emissions. The paper acknowledges the benefits of urban agriculture, such as better eating habits and a connection to nature and neighbors, but suggests that current practices may need improvement. [Extracted from the article]