How this page evolved

Every published version is kept. Each entry shows what changed and why. Earlier versions can be restored by moderators, but only if the material they rely on is still available.

1. Revision 3Oct 12, 2026, 6:32 AMLiveAI-organised, reviewed

   Added two newer sources: a Singapore study linking PM2.5 to acute conjunctivitis (with a disproportionate burden during haze episodes) and a review of acute health impacts covering respiratory, cardiovascular, psychological and neurological outcomes. These broaden the health-effects section beyond asthma and childhood pneumonia and add a Singapore-specific PM2.5 finding.

   • · The main finding was rewritten.
   • · Updated “Reading PSI and PM2.5”.
   • · Updated “What the research says about health effects”.
   • · Updated “What to watch as episodes develop”.
   • · 2 new sources cited.
   • · The note on uncertainty changed.
   • · The key takeaways were revised.
   • · 2 new pieces of guidance for specific situations.
   • · 1 new open question.
2. Revision 2Oct 10, 2026, 11:07 PMAI-organised, reviewed

   AI-prepared Starting Map from live research.

   • · First published version.