13. Ozone is sold to block & ultraviolet (UV) radiation in paragraph 2. What is UV radiation, and what is its connection to ozone depletion?

Step 1: Understand the questionThe question is asking for a definition of UV radiation and its connection to ozone depletion.Step 2: Define UV radiationUV radiation, or ultraviolet radiation, is a type of energy produced by the sun. It is not visible to the human eye. There are three types of UV radiation: UVA, UVB, and UVC. UVC is the most dangerous, but it is completely absorbed by the ozone layer and does not reach the earth.Step 3: Explain the connection to ozone depletionThe ozone layer absorbs the majority of the sun's harmful ultraviolet radiation. When the ozone layer is depleted, more UV rays can reach the earth's surface. This can cause a variety of environmental and health problems, including skin cancer and damage to the eyes and immune system in humans, as well as harm to aquatic ecosystems.Step 4: Extract the final answerUV radiation is a type of energy produced by the sun, which is harmful to living organisms. The ozone layer in the atmosphere absorbs most of this radiation, protecting life on earth. However, human activities have been causing the depletion of this ozone layer, allowing more UV radiation to reach the earth's surface. This is the connection between UV radiation and ozone depletion.