On the fourth International Day of Clean Air for blue skies, it’s time to build multistakeholder partnerships, bolster investment and embrace our shared responsibility to address air pollution. Let us come #TogetherForCleanAir.

In the lead up to the fourth #WorldCleanAirDay, we're featuring updates from United Nations System, partners and others helping to call attention to the severe detrimental impacts of air pollution on human health, climate, biodiversity and ecosystems, and quality of life in general.