Global Air Quality 2025: Health and Environmental Implications
Global Air Quality 2025: Health and Environmental Implications
2025 Health Effects Institute. State of Global Air | Nov 28, 2025
Introduction
The State of Global Air 2025 report highlights the scale and impact of air pollution on global health. An estimated 36% of the world’s population is exposed to PM2.5 levels exceeding 35 μg/m³, while nearly 2.6 billion people remain exposed to indoor pollution from burning solid fuels.
👉 A significant proportion of global atmospheric mercury emissions continues to originate from artisanal and small-scale gold mining, underscoring the importance of transitioning to safer extraction systems →
Air pollution is a major driver of noncommunicable disease, contributing to conditions such as COPD, cardiovascular disease, diabetes, and neurodegenerative disorders. In 2023, approximately 86% of pollution-attributable deaths were linked to these chronic health conditions, particularly among adults over 60.
These patterns are best understood through applied biological systems framework, where environmental inputs and physiological responses are evaluated as integrated systems →
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Research Context
This article provides environmental and public-health context relevant to the broader relationship between chemical exposure, environmental quality, and human health examined across Bruce A. Cosgrove's scientific work.