The ozone layer is a portion of the earth’s atmosphere that contains high levels of ozone.
The atmosphere is divided into five layers: the troposphere, the stratosphere, the mesosphere, the thermosphere, and the exosphere. The troposphere is the layer closest to earth and is where all weather happenings occur. The stratosphere is located directly above the troposphere, about 10- 50 kilometres above the planet, and the ozone layer at an altitude of 20-30 kilometres. The mesosphere is located approximately 50-80 kilometres above the earth, while the thermosphere rests at an altitude of approximately 100-200 kilometres. Finally, the boundary of the outermost layer, the exosphere, extends roughly to 960-1000 kilometres above the earth. For a visual of the lowermost three layers of our atmosphere, refer to the figure below.
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