Impact theme
Air and Health
How polluted air reaches people — and how to cut that risk. ENVR’s atmospheric science, street-level exposure tools and health-based indices inform policy from Hong Kong to the Greater Bay Area.
ENVR traces the path from emissions to lungs. Fine particles (PM2.5), ozone and nitrogen dioxide raise short-term attributable risk and long-term air-quality health risk (AQHR) — especially in dense urban corridors. As particles have fallen, oxidants (NO2 + O3) still carry a substantial share of the burden. Tools such as AQHI and PRAISE-HK turn that science into decisions people and governments can use the same day.
- AQHI
- Health-based index for Hong Kong, designed with ENVR science
- 48h
- PRAISE-HK street-level air and health-risk forecast
- PM2.5
- Still the dominant long-term health burden in the region
- Hong Kong’s Air Quality Health Index (AQHI) — a health-based public index
- PRAISE-HK: street-level air quality and personal exposure forecasts to 48 hours
- Pan–Pearl River Delta PM2.5 science used by Hong Kong, Guangdong and Macao
- Health-risk assessment of PM2.5, ozone and NO2 for cities and travel routes
