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.
Carbon dioxide is one of several greenhouse gases that help in this. Carbon dioxide captures some of this radiated heat and keeps it in the atmosphere. Some other greenhouse gases are water vapor, methane, nitrous oxide, and CFCs. In fact, any gas with three or more atoms acts as a greenhouse gas.arbon dioxide is the most commonly cited greenhouse gas because of  its natural abundance in the atmosphere. It constitutes 80% of the  non-condensing greenhouse gases. Exp â¦ erts believe that the removal  of CO2 will cool the Earth by 30 degrees Celsius.