“The toxicity of medical and industrial gas to the human depends on where it is used. A gas that is regarded as safe in a well ventilated environment at sea level may be a toxic gas in an indoor environment at high altitude.” EnvironmentSeaSafeHumanMedicalAstronomyOshaGasAltitudeToxicHighToxicityAstrophysicsLevelAstronomicalIndustrialAstronomerAstrobiologyIndoorAstrosociobiologyVentilated Author:Steven Magee
“Do you sleep better in a closed bedroom or a well-ventilated bedroom?” SleepDreamsBedroomRestlessInsomniaBetterNighttimeClosedDisordersVentilated Author:Steven Magee