The gas that is most useful in protecting humans against solar radiation is

The gas that is most useful in protecting humans against solar radiation is ozone. Ozone is a molecule that is made up of three oxygen atoms, and it is present in the Earth's atmosphere in the ozone layer, which is located about 10-50 kilometers above the Earth's surface. The ozone layer acts as a shield against the harmful ultraviolet (UV) rays that are emitted by the sun. UV rays can cause skin cancer, cataracts, and other health problems in humans, as well as damage crops and other living organisms. When UV rays hit the ozone molecules in the ozone layer, they are absorbed and converted into heat, which dissipates harmlessly into the atmosphere. This process protects us from the harmful effects of UV rays and helps to maintain a healthy environment on Earth. Therefore, the ozone layer is considered essential for the survival of life on Earth, and its protection is a critical environmental issue.