Mazda believes the road to carbon-neutral motoring doesn't have to mean the end of the internal-combustion engine. Instead, the company is continuing work on algae-derived fuels, it says, that could power existing cars with net-zero or even negative carbon emissions.

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Speaking at the 2025 Japan Mobility Show, Mazda CFO Jeff Guyton told Australian journalists the company's biofuel research aims to make petrol engines part of the long-term solution, not the problem.

"Wouldn't it be great if we could apply a reduced-carbon or carbon-neutral fuel t

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