A nationwide analysis of more than 4 million deaths in Poland (2011–2020) finds that higher air pollution is linked with more deaths from heart and blood‑vessel diseases—but access to mental health services and greener neighborhoods appear to soften the blow. The study, part of the AIR‑MIND project, tracked cardiovascular mortality alongside pollutant levels, local “greenness,” socioeconomic indicators, and rates of psychiatric care use.
What the researchers found
- Dirty air, higher heart risk. Year‑to‑year increases in several common pollutants were tied to more cardiovascular deaths: PM₂.₅ (+2.3%), NO₂ (+11.1%), SO₂ (+8.1%), and CO (+1.8%), per risk‑ratio estimates. All associations were statistically significant.
- Green helps. More trees and parks mattered: a 5% rise in forest cover or recreational green space was linked to a 3.3% lower cardiovascular death rate (risk ratio 0.967 for each).
- Mental health access as a buffer. Areas with higher use of psychiatric services (including depression‑related care) saw a weaker link between pollution and cardiovascular mortality—suggesting that better access to mental health care may reduce some of the cardiovascular harm associated with long‑term pollution exposure.
- Context matters. Socioeconomic status and greenness showed mixed—but generally protective—modifying effects. Not every pollutant behaved the same (for example, patterns differed for NO₂ and CO), underscoring that local conditions shape risk.
Why it matters
Cardiovascular disease remains a leading cause of death worldwide. This study reframes prevention as multidimensional: cleaning the air is crucial, but investing in mental health care and urban greening may also save hearts, particularly in lower‑income or highly urbanized areas. Policymakers could use mental‑health service utilizationas a marker of community vulnerability to environmental risk, the authors suggest.
How big was the study?
The team analyzed 400 million person‑years of observation, recording 4,010,521 total deaths, including 1,706,111 cardiovascular deaths (42.5%) across Poland—providing unusual statistical power to examine how environment, social factors, and mental health interact. (See the graphical abstract on page 2 of the paper.)
Important caveats
This was an ecological study using population‑level data. Mental‑health indicators may reflect both the burden of illness and access to care, and results cannot be applied to individuals. Still, the patterns support integrated public‑health planning: cleaner air, easier access to mental‑health services, and more accessible green infrastructure—especially in socioeconomically disadvantaged areas.
What you can do
- Follow local air‑quality alerts and limit strenuous outdoor activity on high‑pollution days.
- Use and support mental‑health services—treating depression and anxiety is part of heart health, too.
- Advocate for trees, parks, and safe walking routes in your neighborhood.
Source: Michał Święczkowski and colleagues, European Journal of Preventive Cardiology (2025).
Święczkowski, M., Lip, G. Y. H., Abohashem, S., Jemielita, P., Kurasz, A., Duzinkiewicz, M., Januszko, T., Tomaszuk-Kazberuk, A., Dobrzycki, S., & Kuźma, Ł. (2025). Interplay Between Mental Health, Greenness, and Environmental Factors in Cardiovascular Mortality: Insights from AIR-MIND. European journal of preventive cardiology, zwaf534. Advance online publication. https://doi.org/10.1093/eurjpc/zwaf534
Editor’s note: This article is for information only and is not a substitute for professional medical advice.