The gentrification paradox of green-blue adaptation in African cities

The research team of Prof. Kim from KAIST (Professor Seung Kyum Kim) presents the first continent-wide causal analysis showing how green-blue adaptation reshapes urban socio-economic dynamics across African cities. While investments in urban parks, wetland restoration, river rehabilitation, and flood-control infrastructure are widely seen as essential for climate resilience, the study reveals that these interventions can also accelerate early-stage gentrification dynamics.

Using two decades of satellite-based environmental and socio-economic panel data from 5,503 cities and municipalities across 32 African countries, the team applied a Difference-in-Differences approach to compare treated and untreated areas over time. The results show that adaptation interventions significantly increase a composite gentrification index, indicating that environmental improvements are accompanied by capital reinvestment and socio-spatial restructuring.

Following adaptation, housing prices rose by 13.0%, population by 52.9%, the share of young adults by 4.5%, homeownership by 7.8%, and household consumption by 20.3%, alongside modest income growth—reflecting increased urban attractiveness and investment inflows while intensifying affordability pressures, especially in dense urban cores.

Policy design plays a critical role. Rent control alone did not mitigate gentrification pressures, whereas cities with structured resettlement support programs experienced substantially weaker impacts, highlighting the importance of integrated housing and social protection policies.

Prof. Kim emphasized that climate adaptation is also a socio-economic transformation with distributive consequences, calling for stronger tenure security, community participation, social impact assessments, and value-capture mechanisms.

Published in Nature Cities (April 2026), this study establishes a new framework linking climate resilience with urban inequality. This research was supported by the National Research Foundation of Korea (NRF), funded by the Ministry of Science and ICT (RS-2025-02312954) and the Shanghai Nature and Health Foundation.