What is the layer of gas that serves as a shield and filters out harmful rays from the sun?

The layer of gas that serves as a shield and filters out harmful rays from the sun is the ozone layer. Located in the stratosphere, it absorbs the majority of the sun's harmful ultraviolet (UV) radiation, protecting living organisms on Earth from potential damage. This protective layer is crucial for maintaining the health of ecosystems and preventing skin cancer and other UV-related health issues in humans.