title: Exxon adds respiratory training to modules.
mesh_terms: D000395:Air Pollutants, Occupational / Q000009:adverse effects*; D000475:Alkenes; D002617:Chemical Industry; D006266:Health Education / Q000379:methods*; D006801:Humans; D016273:Occupational Exposure / Q000517:prevention & control*; D012134:Respiratory Protective Devices; D014481:United States; D014489:United States Occupational Safety and Health Administration
chemical_list: D000395:Air Pollutants, Occupational; D000475:Alkenes