Next Wednesday the UN marks the third International Day of Clean Air for Blue Skies. However, the skies are far from clear of air pollution. Only a month ago, the World Health Organization (WHO) warned that practically all the air we breathe is polluted, and that it’s killing around seven million people every year.

Ahead of the International Day, Conor Lennon from UN News spoke to Martina Otto and Nathan Borgford-Parnell from the Climate and Clean Air Coalition, which is hosted by the UN Environment Programme (UNEP).

They discussed the evolving science surrounding the issue, the extent to which air pollution is improving – if at all – and why international collaboration is essential, if the number of annual deaths is to be addressed.

Music: Ketsa, Within the Earth