A report on the hazards of Fracking .
“Work in the oil and gas industry can be dangerous. In the United States, the risk of death in this sector is seven times the average risk for industry as a whole. In addition to safety risks such as vehicle collisions, explosions, fires, and falls, risks to workers include exposure to a wide range of chemicals. In the US, exposures above occupational exposure limits have been recorded for both benzene and silica. In the case of silica these exceedances were up to 20 times the prescribed limits.”