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No, chemicals like Freon (i.e. chlorofluorocarbons, CFCs, halons) transport chlorine to the ozone layer where the chlorine catalyzes the conversion of ozone (O3) back to ordinary oxygen (O2). A single chlorine atom is such an effective catalyst that it can breakdown 1000 to 10000 ozone molecules while it is in the ozone layer. These chemicals have traditionally been used in refrigerators, freezers, air conditioners, aerosol cans, fire extinguishers, etc. because they are nontoxic and do not burn.

Rockets and missiles do not use these chemicals.

Producing safe replacements for these chemicals that will not transport chlorine to the ozone layer has been difficult. Some replace the chlorine with other elements (e.g. fluorine, hydrogen, bromine) that cannot catalyze the breakdown of ozone, sometimes flammable hydrocarbons (e.g. butane) are used as replacements (e.g. aerosol cans).

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7y ago

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