Video encyclopedia

Ozone layer


Climate 101: Ozone Depletion | National Geographic


What is Ozone Layer? - Environmental Science for Kids | Educational Videos by Mocomi


Flight at the Edge of the Ozone Layer | One Strange Rock


Ozone Layer is Healing!


NASA data shows hole in ozone layer is shrinking

The ozone layer or ozone shield is a region of Earth's stratosphere that absorbs most of the Sun's ultraviolet radiation. It contains high concentrations of ozone (O3) in relation to other parts of the atmosphere, although still small in relation to other gases in the stratosphere. The ozone layer contains less than 10 parts per million of ozone, while the average ozone concentration in Earth's atmosphere as a whole is about 0.3 parts per million. The ozone layer is mainly found in the lower portion of the stratosphere, from approximately 20 to 30 kilometers (12 to 19 mi) above Earth, although its thickness varies seasonally and geographically.
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