What do you call the layer of gas that helps to block the suns harmful rays?

The layer of gas that helps to block the sun's harmful rays is called the ozone layer. Located in the stratosphere, it contains a high concentration of ozone (O₃) molecules, which absorb the majority of the sun's harmful ultraviolet (UV) radiation. This protective layer is crucial for safeguarding life on Earth from the damaging effects of UV rays, which can lead to skin cancer and other health issues.