B2 the gas formed when carbon is burned, or when people or animals breathe out二氧化碳
More examples
Plants absorb carbon dioxide during photosynthesis.
A molecule of carbon dioxide (CO2) has one carbon atom and two oxygen atoms.
Microbes decompose organic waste into a mixture of methane and carbon dioxide.
The increased use of natural gas will help reduce carbon dioxide emissions.
There has been a sudden and worrying rise in the level of carbon dioxide in the atmosphere.
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