Skip to main content
Fig. 1 | Environmental Health

Fig. 1

From: Combined effect of silica dust exposure and cigarette smoking on total and cause-specific mortality in iron miners: a cohort study

Fig. 1

Annual respirable silica concentration for different job titles, classified by major activity groups, 1950–2012. Horizontal axis represents the year of industrial production and vertical axis represents respirable silica concentration. Solid line represents annual average respirable silica concentration among all the silica-exposed job titles and the other three types of dotted lines represent annual average respirable silica concentration among the specific major activity groups, that is underground mining, open-pit mining and ore separation process group

Back to article page