Occupational hygiene is about the prevention of ill-health from work, through recognising, evaluating and controlling the risks. Health risks can arise in all sorts of working environments, and this photo, from the current issue of BOHS's journal, Annals of Occupational Hygiene, shows a controlled forest burn in the south west United States, where a team has been evaluating firefighter exposure to polycyclic aromatic hydrocarbons.  Other papers in this issue come from nine countries and illustrate the breadth of occupational hygiene, including: control of nanoparticles; toxicity of formaldehyde and lead; asbestos from car brakes; pesticides in developing countries; exposure modelling for control; cooking fumes in Nepal, and specifying measurement uncertainty. But hygienists can probably help you with cost-effective control of health risks wherever you are!  Click here to see the full-size picture.  [Photo courtesy of Gerald Poplin, Mel and Enid Zuckerman College of Public Health, University of Arizona.]