Hazardous Materials Identification System. The Hazardous Materials Identification System (HMIS) is a numerical hazard rating that incorporates the use of labels with color developed by the American Coatings Association as a compliance aid for the OSHA Hazard Communication Standard. 1 HMIS Color Bar.
Definition of greenhouse gas. : any of various gaseous compounds (such as carbon dioxide) that absorb infrared radiation, trap heat in the atmosphere, and contribute to the greenhouse effect.
the primary greenhouse gases in earth s atmosphere are water vapor carbon dioxide methane nitrous oxide and ozone without greenhouse gases the average temperature of earth s surface would be about 15 c 27 f colder than the present average of 14 c 57 f greenhouse gas sometimes abbreviated ghg is a gas in an atmosphere that absorbs and emits radiation within the thermal infrared range this process is the fundamental cause of the greenhouse effect