Mental Health Noncommunicable Diseases
• Research & Reports
What Is Planetary Health?
Brain Health
Our environment shapes neurological function and mental well-being, while resilient brains empower societies to adapt to and mitigate planetary challenges.
1 in 4 dementia deaths worldwide, approximately 626,000 deaths each year, is attributable to air pollution.
Brain health sits at the heart of Planetary Health, reflecting the dynamic relationship between human biology, social systems, and the environments we depend on to survive and thrive. The brain, our organ of cognition, emotion, behavior, and social connection, is uniquely sensitive to environmental conditions shaped by how we steward the planet. Rising temperatures, air and water pollution, extreme weather events, food and water insecurity, ecosystem degradation, and exposure to environmental toxins all affect neurological function, cognitive performance, and mental health across the lifespan.
20-30 minutes in natural environments can significantly improve attention, working memory, and executive function, compared with urban settings.
At the same time, healthy brains enable learning, creativity, cooperation, and collective decision-making, capacities that societies need to adapt to environmental change, design sustainable systems, and respond to crises. When environmental degradation undermines brain health, it weakens individual well-being, social cohesion, productivity, and communities’ ability to respond effectively to planetary challenges. This makes brain health both a vulnerability and a leverage point within the Planetary Health framework.
Our Brain Under Environmental Stress
Scientific evidence increasingly shows that environmental stressors act on the brain through interconnected biological, psychological, and social pathways. Heat stress disrupts sleep, cognition, and mental health; air pollution accelerates cognitive decline and increases the risk of dementia and neurodevelopmental disorders; extreme weather events drive trauma, displacement, and long-lasting effects on mental and cognitive health. These risks are not evenly distributed. Children, older adults, people with pre-existing neurological or mental health conditions, and communities facing socioeconomic disadvantage bear a disproportionate burden. A Planetary Health approach therefore requires centering on equity, prevention, and resilience.
Planetary Health Solutions for Brain Health
Crucially, many Planetary Health solutions are also brain-protective solutions. Cleaner air, climate-resilient food systems, access to green and blue spaces, urban tree canopies, reduced noise and heat exposure, and stronger social infrastructure all support cognitive function, emotional well-being, and neurological health while delivering environmental co-benefits. By explicitly integrating brain health into Planetary Health research, policy, and practice, we can better capture the full human benefits of environmental action and design interventions that strengthen both people and planet.
Resources
Mental Health Youth Voices
• News
Climate Change’s Hidden Mental Toll On Children Think Global Health.
Mental Health Noncommunicable Diseases
• Research & Reports
Environmental Neuroscience Springer Nature Link.
Chemical Pollution Nutrient Overloading and Cycling
Arsenic in aquatic ecosystems: Sources, risks, remediation, and governance in India with respect to global significance. Water, Air, & Soil Pollution.
The contamination of groundwater with arsenic is a global concern, threatening ecosystems and human health. In India’s Indo-Gangetic plains, researchers found high arsenic levels from natural and human sources are linked to skin lesions and cancer. Improved monitoring systems and community-engaged water governance are needed to promote safe drinking water.
• Research & Reports
Food Systems Equity and Justice
The human cost of healthy eating: Some recommended US diets carry higher risk of forced labor in food supply chains. Phys Org.
• Research & Reports
Infectious Diseases Land Use and Land Cover Change
Adaptive ecosystem restoration to mitigate zoonotic risks. Nature Ecology & Evolution.
Infectious diseases pose a substantial threat to global health security. Key wildlife species, potentially harbouring numerous zoonotic pathogens, are increasingly being forced to adapt to disturbances from land-use change, human encroachment, and climate change.
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Planetary Health Frameworks
Topical collection: Aerobiology and planetary health. Aerobiologia.
• Research & Reports
Infectious Diseases Biodiversity Loss
A One Health framework for global and local stewardship across the antimicrobial lifecycle. Nature: Communications Medicine.
• Research & Reports
