UVC is extremely dangerous, but it is completely absorbed by ozone and normal oxygen (O<sub>2</sub>). Since UVC has high energy it is used in the sterilization of food, water and even air. | UVC is extremely dangerous, but it is completely absorbed by ozone and normal oxygen (O<sub>2</sub>). Since UVC has high energy it is used in the sterilization of food, water and even air. |