The Science Behind Urban Plants and Human Health: Biological and Psychological Mechanisms of Nature-Based Healing

Abstract

As urbanization accelerates, diminishing green spaces pose growing public health challenges, exacerbating pollution exposure, stress, and chronic illnesses. This narrative review synthesizes research on the biological and psychological pathways through which urban plants promote human health. Biologically, urban greenery enhances air quality by filtering pollutants, strengthens immune function by increasing microbial diversity, and regulates stress physiology via endocrine mechanisms. Psychologically, nature exposure restores cognitive function, reduces stress, and fosters emotional resilience, as evidenced by neuroimaging and epidemiological studies. The findings suggest that integrating green infrastructure into urban environments yields measurable public health benefits, including lower mortality rates, reduced cardiovascular and respiratory disease prevalence, and improved mental well-being. However, critical research gaps remain regarding the optimal “doses” of nature for health, cultural differences in nature perception, and the potential role of incorporating insights from quantum and informational theories to study cognitive-environment interactions (e.g., Granular Interaction Thinking Theory). Addressing these gaps through interdisciplinary collaboration, artificial intelligence integration, and data-driven urban planning can help cities evolve into healthier, more sustainable ecosystems.

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Author Profiles

Quan-Hoang Vuong
Phenikaa University
Minh-Hoang Nguyen
Phenikaa University
Sari Ni Putu Wulan Purnama
Widya Mandala Surabaya Catholic University

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