The annual Harold I Schiff Lecture is held by the Centre for Atmospheric Chemistry at York University. This year's speaker was Professor Jon Abbatt from the University of Toronto, who highlighted the impact of Schiff's writing with Lydia Dotto in 'The Ozone War' as an historic work making atmospheric chemistry accessible to the public. Professor Abbatt highlighted a wide variety of findings from work funded by NSERC from the internationally collaborative NETCARE project exploring the nature of atmospheric aerosol in the Canadian Arctic.