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If all car tyres were filled with CO2, would this cut atmospheric carbon significantly?

The long-running series in which readers answer other readers’ questions probes an intriguing scientific question in relation to the climate emergency

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🕒 23 Aug 2026 20:00

If all car tyres were filled with CO2, would this cut atmospheric carbon significantly?

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If all the vehicles on the planet had their tyres pumped up with CO₂, would this lock up enough carbon to lower the amount in the air significantly? Would there be other issues, such as the carbon cost of trapping it all into the tyres? Chris Coldwell, Lancaster

Post your answers (and new questions) below or send them to nq@theguardian.com. A selection will be published next Sunday.

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