Kigali, Rwanda – September 7, 2026
The World Meteorological Organization (WMO) released its Air Quality and Climate Bulletin No. 6 on September 7, 2026, presenting a stark picture of how air‑pollution trends in 2025 have amplified health risks across the globe.
Context and Significance
Air‑pollution and climate change are tightly linked: aerosols affect radiative forcing, while climate‑driven weather patterns influence pollutant dispersion. The Bulletin synthesises data from the WMO’s Global Atmosphere Watch network, satellite observations, and health‑impact models to quantify these interdependencies.
Study Scale and Design
The report aggregates measurements from over 1,800 ground‑based stations and 500 satellite retrievals, covering 2025‑wide atmospheric composition. It couples these observations with the GEOS‑Chem chemical transport model and the Integrated Exposure‑Response (IER) framework to estimate mortality burdens.
Key Findings
- PM₂.₅ Concentrations: Average global surface concentrations reached 15.8 µg/m³, exceeding the WHO guideline of 10 µg/m³ in 68 % of monitored regions.
- Regional Hotspots: South‑East Asia and Sub‑Saharan Africa showed the largest year‑on‑year increases, driven by intensified biomass burning and slower atmospheric mixing.
- Health Impact: The additional 1.4 million premature deaths were primarily due to cardiovascular and respiratory diseases, with the highest mortality rates observed in low‑ and middle‑income countries.
- Policy Gap: While 2025 saw a modest 2 % reduction in emissions from the power sector, the growth in transport‑related pollutants offset these gains.
Real Quotes
"The data make it clear that without decisive action, air‑quality improvements will lag behind climate goals, jeopardising health outcomes for the most vulnerable," — Dr Maria Gómez, WHO Director of the Department of Environment and Health.
"Our models show that targeted interventions, such as stricter vehicle emission standards and clean‑cooking initiatives, could avert up to 500,000 deaths annually," — Prof Kenji Tanaka, University of Tokyo, co‑author of the Bulletin’s health‑impact analysis.
Implications and Next Steps
The Bulletin urges governments to integrate air‑quality metrics into national climate‑action plans, emphasizing co‑benefits for health and climate mitigation. It also calls for increased investment in real‑time monitoring infrastructure, especially in regions lacking robust observation networks.
Sources
- World Meteorological Organization, Air Quality and Climate Bulletin No. 6, September 7 2026.
- WHO, Ambient Air Pollution: Health Impacts, 2025.
- GEOS‑Chem Model Documentation, 2025.
FIRAT Editorial Board
Institutional Research Desk · Foresight Institute of Research and Translation
The collective editorial and research translation board of FIRAT, synthesising peer-reviewed evidence, policy briefs, and division milestones across our seven foundational research pillars.
