title: Fatalities attributed to methane asphyxia in manure waste pits--Ohio, Michigan, 1989.
mesh_terms: D000062:Accidents, Occupational / Q000401:mortality*; D000293:Adolescent; D000328:Adult; D000368:Aged; D000383:Agriculture; D001237:Asphyxia / Q000139:chemically induced / Q000401:mortality*; D006801:Humans; D008297:Male; D008372:Manure; D008697:Methane / Q000009:adverse effects*; D008824:Michigan; D008875:Middle Aged; D009314:National Institute for Occupational Safety and Health, U.S.; D009820:Ohio; D014481:United States
chemical_list: D008372:Manure; D008697:Methane