Intended for healthcare professionals

Letters Air pollution and asthma

Why have we been slow to act on air pollution as a public health issue?

BMJ 2020; 370 doi: (Published 21 September 2020) Cite this as: BMJ 2020;370:m3680
  1. Gabriel L Van Duinen, senior peer assisted learning facilitator
  1. Level 2, 4 Eastern Road, Macquarie University NSW 2113, Australia
  1. gabriel.vanduinen{at}

Holst and colleagues discuss the asthma risk to children of being exposed to fine particular matter (PM2.5).1 Their findings should be of concern to everyone interested in public health.

Over 92% of the world’s population has exposure to levels of PM2.5 that exceed World Health Organization guidelines.2 This is not just the smog and haze seen …

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