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

But what happens when it leaks? Photograph: Westend61/Getty Images

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

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