International Day of Clean Air for blue skies
September 7 · Level 9 · #346 of 2238
This UN day puts clean air on the shared agenda for human health and the environment. It connects awareness of pollution with practical measures such as cleaner transport, lower emissions and better air-quality monitoring.
How it is celebrated: educational campaigns, public discussions and learning activities explain where pollution comes from. Cities, organizations and researchers share measurements and present ways to reduce harmful emissions.
A blue sky is no guarantee of clean air. Some harmful pollutants, including ground-level ozone and fine particles, cannot be detected simply by looking outside.