(TNS) — As automakers invest heavily in electric vehicles for the future, some also are dabbling in technology that could reduce emissions from internal combustion engines and help fulfill pledges to achieve carbon neutrality.

Porsche AG, for example, is researching the use of synthetic fuels, or eFuels. These fuels, the German automaker says, have the potential to make internal combustion engine vehicles run as clean as EVs, but the problem, experts say, is cost — from both financial and energy-efficiency perspectives.

Porsche CEO Oliver Blume told Hagerty that a synthetic replacement for gasoline currently costs about $37 per gallon — though he said his team is working to bring that down. Gasoline currently averages less than $3 per gallon in Michigan.

It’s more expensive and energy-intensive to make synthetic fuels, which is why they aren’t widely…

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