CFC molecules are broken down in the
stratosphere by ultraviolet light to give highly reactive chlorine atoms. Then chlorine atoms react with ozone molecules. Last chlorine atoms are regenerated by this chain reaction so can react with
more ozone molecules.
Answer:
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When American presidents would held peace talks between Israeli and Palestinian leaders.Peace talks can help in resolving conflicts and would help the nations to be united. Hope this would be the right answer and this would be of help then.