Why you should be thinking about particulate matter: PART ONE 1️ What is it and where does it come from? 樂 This #cleanairday, we'll release a series of short videos filmed earlier this year with Professor Timothy Hinks from University of Oxford. Professor Hinks is the Associate Professor of Respiratory Medicine and he runs the Oxford Special Airway Clinic, helping people with asthma in Oxfordshire. Stay tuned for part two  | Oxford City Council | Facebook