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Carbon dioxide

UK //ˈkɑːbən daɪˈɒksʌɪd// US //ˈkɑrbən daɪˈɑksaɪd// Pronunciation

Definition

A colorless gas produced by burning carbon and organic compounds.

Listen to definition

In simple words: A gas that plants need and we produce when breathing.

Examples

• Plants absorb carbon dioxide during photosynthesis.
• Excess carbon dioxide in the atmosphere contributes to global warming.
• We breathe out carbon dioxide as a waste product.
• High levels of carbon dioxide can be harmful to health.
• Carbon dioxide is used in carbonated drinks to create fizz.

Usage notes

Commonly used in environmental science and discussing climate change. Avoid using it in casual conversations.

Grammar pattern

standalone term

Memory hint

Think of 'carbon' as part of a car's exhaust, which produces carbon dioxide.

Collocations

• carbon dioxide emissions
• reduce carbon dioxide
• carbon dioxide levels

Synonyms

• CO2
• carbonic acid gas
• carbonic anhydrase

Common mistakes

• Confused with carbon monoxide, which is toxic.
• Using 'dioxide' by itself without 'carbon'.
• Not recognizing its role in climate discussions.