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NIOSH, or the National Institute for Occupational Safety and Health, is the U.S.
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federal agency responsible for conducting research and making recommendations
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for the prevention of work-related injury and illness.It might be considered a
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sister agency of OSHA, since both were created by passage of the Occupational
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Safety and Health Act.
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Stress, Pressure, Depression, Anxiety, and all other mental illnesses can lead to smoking.
You haven't provided enough information for us to be able to answer your question. :c
