Ozone is a natural part of Earth’s atmosphere. It is similar to oxygen (that we breathe), but ozone has 3 oxygen molecules and oxygen that we breathe has two. , The ozone layer is a layer of ozone in the atmosphere that protects the Earth from the sun’s UV rays. About 93 - 98% of the sun’s UV rays are absorbed by the ozone layer., The ozone layer is in the stratosphere. As elevation increases, the stratosphere gets warmer. Because the ozone gases in the upper layers absorb the intense ultraviolet radiation from the sun. , Chemicals called chlorofluorocarbons (CFCs) are a reason we have a thinning ozone layer. We used them in aerosol sprays, air conditioners, and refrigerators., When scientists discovered that CFCs were destroying ozone, they worked together with the governments of the world to stop the production of the CFCs., A special agreement called the Montreal Protocol says that industries cannot use CFCs anymore. CFCs can stay in the atmosphere for 100 years.,

Ozone Layers

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