Heatwaves, flooding, and air pollution are set to worsen as climate change continues. Yet, many cities are not fully tapping into nature-based solutions that could safeguard communities and infrastructure.
A recent international study from the University of Surrey’s Global Centre for Clean Air Research (GCARE) highlights why green and blue infrastructure (GBI)—like trees, parks, rivers, and green roofs—remains underutilized. The study drew on insights from over 500 scientific papers and involved 86 experts across 11 countries.
Instead of just focusing on the benefits, this research identifies 21 overlooked barriers that keep GBI from achieving its potential. These challenges fall into four main categories: technical and integration issues, social and economic hurdles, plus governance gaps.
Some of the major blockers include conflicts with net-zero goals, fragmented research, and unintended consequences—like pollen allergies or emissions from poorly designed wetlands. Regulations are often inadequate, biodiversity is undervalued, and there’s a lack of public engagement. Cities also struggle with selecting resilient plant species and meeting diverse design preferences from residents.
Professor Prashant Kumar, the study’s lead author, notes that there’s a persistent gap between ambition and action. “While everyone wants greener cities with parks and trees, implementation often lags behind policy goals,” he explains.
The study, published in The Innovation, offers twelve recommendations to better integrate GBI into urban settings. Suggestions include customizing frameworks for local needs, investing in underserved neighborhoods, and encouraging community involvement in planning processes.
Dr. Maria Athanassiadou from the UK Met Office emphasizes the importance of this collaborative approach. The research effectively merges environmental and social sciences, engineering, and urban planning to reveal both successful strategies and common pitfalls in GBI projects.
According to Dr. Ajit Ahlawat of Delft University of Technology, the findings validate GBI as a practical solution for climate action, helping cities reduce their emissions and work toward net-zero targets. This study not only bolsters Surrey’s ongoing focus on clean air and nature-based solutions but also aligns with global initiatives like the UN Sustainable Development Goals and the Paris Agreement.
A deeper understanding of these barriers might just pave the way for more effective climate strategies. As cities confront these challenges, innovative GBI solutions could significantly improve urban resilience and public health.
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