Chlorofluorocarbons CFCs are a class of organic compounds containing carbon, chlorine, and fluorine atoms. The general molecular formula for CFCs is CnClxF 2n+2-x , where n represents the number of carbon atoms and x represents the number of chlorine atoms. Some common examples of CFCs include CFC-11 CCl3F , CFC-12 CCl2F2 , and CFC-113 CCl2FCClF2 .CFCs contribute to the depletion of the ozone layer through a series of chemical reactions. When CFCs are released into the atmosphere, they eventually reach the stratosphere, where they are exposed to ultraviolet UV radiation. This radiation causes the CFC molecules to break apart, releasing chlorine atoms. These chlorine atoms then react with ozone O3 molecules, breaking them down into oxygen O2 molecules and chlorine monoxide ClO . The chlorine atoms are not destroyed in this process and can continue to break down thousands of ozone molecules, leading to significant depletion of the ozone layer.To decrease the usage and impact of CFCs on the ozone layer, several measures can be taken:1. Phasing out the production and use of CFCs: The Montreal Protocol, an international treaty signed in 1987, aimed to phase out the production and use of CFCs and other ozone-depleting substances. This has led to a significant reduction in the release of CFCs into the atmosphere.2. Developing and using alternative substances: Many industries have replaced CFCs with alternative substances that have less impact on the ozone layer, such as hydrofluorocarbons HFCs and hydrochlorofluorocarbons HCFCs . However, some of these alternatives have high global warming potential, so further research is needed to develop more environmentally friendly alternatives.3. Proper disposal and recycling of CFC-containing products: Ensuring that products containing CFCs, such as old refrigerators and air conditioners, are properly disposed of and recycled can help prevent the release of CFCs into the atmosphere.4. Raising awareness and promoting responsible consumption: Educating the public about the harmful effects of CFCs and encouraging responsible consumption and disposal of products containing these chemicals can help reduce their impact on the ozone layer.5. Strengthening regulations and enforcement: Governments can implement stricter regulations on the production, use, and disposal of CFCs and other ozone-depleting substances, as well as enforce penalties for non-compliance.