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CO₂ is the molecular formula for carbon dioxide.

CO2, Co2 or C02 may also refer to:

Arts and entertainment

• CO2 (album), a music album by Stahlmann
• CO2 (opera), an Italian opera by Giorgio Battistelli
• CO2 (film), a 2018 Burmese film

Places

• Grand Geneva Resort Airport (FAA LID code)
• CO2, a postcode district in the CO postcode area, England

Science and technology

• Conway group Co2, a mathematical group
• Malignant neoplasm of other and unspecified parts of tongue (ICD-10 code); See Oral cancer