They are inefficient and more harmful to the environment.

There are two main solutions to make cars zero-emission - use of batteries or hydrogen fuel cells to supply electricity to electric motors.

At InsideEVs, we were always backing batteries and are very sceptical about hydrogen, mainly because up to around three times lower energy efficiency. But this is not the only flaw with hydrogen fuel cell vehicles (FCV). The other main obstacles are cost of cars and hydrogen fuel and lack of hydrogen refuelling infrastructure (it's expensive too). All those things have been an issue for at least the last 10-15 years.

Recently, Volkswagen Group boss Herbert Diess has criticised the use of hydrogen in cars, pointing to a study from the Potsdam Institute for Climate Impact Research (PIK): "Please listen to the science:"

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