Emphasizing the need to make further efforts to improve air quality to protect human health, the UN Member States decided to designate 7 September as the International Day of Clean Air for Blue Skies. On the occasion of the first International Day of Clean Air for Blue Skies and noting the importance of clean air for health, economy and environment, the Asian Development Bank (ADB) will launch a series of virtual knowledge events on Air Quality on 7 September. The first webinar on Clean Air - for a Happy, Healthy and Prosperous Society, will discuss the background of the International Day of Clean Air for Blue Skies, health and economic costs of poor air quality in the Asia and the Pacific region, challenges and solutions to improve air quality in cities and communities in Asia and the Pacific and potential investments to address air pollution.