Urban Food and Nutrition Security Resilience through Urban Agriculture: A Circular Economy Approach

Laura Barasa (), Evelyne Kihiu (), João Manuel Lameiras Vaz () and Chrysantus Tanga ()
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Laura Barasa: University of Nairobi, School of Economics
Evelyne Kihiu: International Potato Center
João Manuel Lameiras Vaz: Universidade Nova de Lisboa, Campolide Campus
Chrysantus Tanga: International Centre of Insect Physiology and Ecology

No 26-1, EfD Discussion Paper from Environment for Development, University of Gothenburg

Abstract: Food and nutrition insecurity, combined with poor waste management and sanitation, are common features of urban informal settlements. We conducted a cluster-randomized controlled trial with 810 households in Kibera to evaluate the effects of urban agriculture interventions—climate smart gardens (CSGs) and black soldier fly frass fertilizer (BSFFF) derived from recycled human waste—on food and nutrition security, household welfare, and food production. The interventions significantly enhanced food and nutrition security and home food production, with stronger effects observed in female-headed households. While vegetable consumption expenditure declined, food and total consumption expenditure remained unaffected. These results underscore the potential of circular economy interventions to simultaneously improve nutrition, waste management, and gender equity in densely populated informal settlements.

Keywords: urban agriculture; informal settlements; climate smart gardens; frass fertilizer; food and nutrition security; household welfare; food production; gender equality (search for similar items in EconPapers)
JEL-codes: I31 N57 Q12 Q15 Q18 Q53 (search for similar items in EconPapers)
Pages: 30 pages
Date: 2026-02-11
New Economics Papers: this item is included in nep-iue
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