Greater exposure to ambient ultrafine particles (UFPs, <0.1 µm) produced by fuel burning could increase people’s chances of getting brain cancer according to a new study by a team of researchers in Canada in the journal Epidemiology . This is the first study to suggest a relationship with the incidence of brain tumors, although previous work has shown that nanoparticles can get into the brain and that they can carry carcinogenic chemicals. An open-access paper on the work is published in the journal Epidemiology . The researchers conducted a cohort study of within-city spatial variations in ambient UFPs across Montreal and Toronto, Canada among 1.9 million adults included in multiple cycles of the Canadian Census Health and Environment Cohorts (1991, 1996, 2001, and 2006). The researchers assigned UFP exposures (3-year moving averages) to residential locations using land use regression models with exposures updated to account for residential mobility within […]