environmental and occupational health concerns will have an effect on the developing oil shale technologies . 
 the mining and crushing of large volumes of rock will be a characteristic of at least some of these technologies , and above ground disposal of proceessed shale will require adequate control measures . 
 exposure by inhalation to the dusts that may arise from shale oil technologies may present a hazard both in the work force and in the local population . 
 animal studies dealing with the effects of oil shale - related materials in the lung are in progress . 
 experiments involving syrian hamsters exposed by inhalation and by intratracheal instillation are described.imagesfigure 1.figure 2.figure 3.figure 4.figure 5 .