But Michelin, Continental and Pirelli (PIRC.MI) told Reuters they are pursuing alternatives to 6PPD, with Michelin and Continental adding collective industry action may be necessary to find solutions. Continental said its dandelion tyres were developed to find a sustainable form of natural rubber, and addressing 6PPD was a separate focus. The worst-performing rival tyres Michelin has tested so far emit around 8 kg per year. Michelin and Continental said they are already focused on making their tyres more durable - Michelin cut its tyre emissions 5% between 2015 and 2020, Roget said. "The advent of the EV is the time to make this change," to improve tyres," Enso's Erlendsson said.

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