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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]

A paper published in November 2023 in Environmental Health Perspectives discusses the potential presence of contaminants in compost produced from urban food and yard waste, such as pesticides, lead dust, and PFAS. The research team conducted case studies in Boston, Seattle, San Francisco, and New York City, examining waste-to-compost activities and legislation. The authors argue that inequities in composting practices are partially due to historical marginalization and loss of land, leading to food inequality among communities of color. They recommend that cities address these inequities by providing multilingual and multimedia communication and education about composting, and by engaging with volunteer garden coordinators and community organizers to advocate for the needs of community farmers and growers. [Extracted from the article]

The article highlights Carbios' composting additive for polylactide bioplastics being added to the U.S. Food and Drug Administration Inventory of Food Contact Substances, enabling the creation of fully compostable packaging materials in the U.S.