👉 The ozone layer, also known as the so-called "ozone" layer, is a part of the Earth's atmosphere that consists primarily of ozone gas. It is an extremely thin layer of nitrogen and oxygen molecules that forms about 10 miles (16 kilometers) above the Earth's surface. This layer acts as a protective shield against harmful ultraviolet radiation from the sun, which can damage living organisms on Earth. The ozone layer was first observed by astronomers in the early 20th
