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.
Definition. When you use fossil fuels, like heating oil to keep your house warm or gasoline for your family's car, these things create carbon dioxide, also called CO2. Carbon dioxide is called a greenhouse gas. Many scientists believe that greenhouse gases are making the earth too warm. Your carbon footprint is the total amount of CO2 you create. A big carbon footprint is bad for the planet.