1. Air Quality Health Index
2. Air Quality and Health
3. Air Quality Monitoring
4. Regional Air Pollution
5. Tropical Cyclone and Air Quality
6. Photochemical Smog
You may also visit the following links for more information.
EPD - Clean Air and You: http://www.epd.gov.hk/epd/english/environmentinhk/air/prob_solutions/clean_air_you.html
HKO - Cool Met Stuff: https://www.youtube.com/playlist?list=PLBdhEGSPvUGVuK7fZUxHKzv51Y_2hy_hW (only available in Chinese)