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carbon dioxide - definition and synonyms

 
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noun [uncountable] chemistry carbon dioxide pronunciation in British English /ˌkɑː(r)bən daɪˈɒksaɪd/
  1. a gas without colour or smell, produced when you breathe out or when substances containing carbon are burnt. The fact that the earth is getting hotter because of carbon dioxide in the atmosphere is called the greenhouse effect.

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