My main research interests are in airborne particulate pollution and geology & human health. This work has mainly concentrated on airborne mineral dust and respiratory health issues, however in recent years I have also been investigating dermal exposures to bioreactive minerals. The health outcomes of respiratory exposure to mineral dusts is very dependant on the mineralogy, from recognised hazards such as asbestos through to the less well understood minerals such as clays. For thousands of years certain clays have be recognised to have medicinal properties, however the actual mechanisms of these benefits are unclear. The great potential in this work is the identification of new natural antimicrobial agents. Through my supervision of numerous AEG Masters dissertations I am developing a growing interest in the application and advantages of Environmental Assessments. I retain interest in the study of fossil charcoal, which was the subject of my PhD.