The prime culprits in the destruction of atmospheric ozone, the layer of the Earth’s stratosphere that absorbs the bulk of the sun’s harmful UV rays, are bromine and chlorine. These atoms are released by the breakdown of chlorofluorocarbons (CFCs) emitted from the Earth’s surface by various industrial processes. Due to the known dangers of CFCs they have been banned from use in most applications, but used to be commonly used in cooling systems, as aerosol propellants, and as industrial lubricants.
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