Radiation is all around us in the atmosphere and in common everyday items. Items containing radioactive elements are used in a wide variety of industrial and medical applications. In this video, will see the Department of Transportation’s definition of Radioactive materials, the different types of radiation that exist, the ways class 7 radioactive materials are being used today, the communication requirements for a vehicle carrying Class 7 materials and some general guidelines on how to respond to an incident involving radioactive materials.