what CFC’s are and how we knew that is what was causing the destruction of the ozone layer
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CFCs are a category of gasses that were popular for commercial applications because they were cheap and easy to manufacture with various physical qualities like flammability or the opposite, fire retardant, very low density, very high density etc. However it turned out that because they were so simple and reactive that they were interacting with this gas (ozone) that protects the earth from solar radiation and turning it into regular oxygen. That seems safe since oxygen isn’t harmful or anything of course but it turns out enough of it was being produced to appreciably reduce that protective layer of ozone.
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