ocr: OZONE and OZONE LAYER 03 A molecule formed by three oxygen atoms. Ozone molecules form a layer called the ozonesphere, in the stratosphere of the atmosphere, at the height of about 20 km. This layer contains about 90% of the atmosphere's ozone. Itab- sorbs ultraviolet radiation from the Sun, protecting all living things on Earth from this dangerous radiation. Ozone is a dangerous gas at low altitudes and aggravates the greenhouse ef- fect. Ozone is produced by traffic, by burning organic waste and by natural emission. The European ERS 2 studying the ozone- sphere (blue). In 1840 the German che ...
