Hydrogen fuel cells have always presented an interesting alternative to conventional battery-powered EVs . They offer the advantage of having an on-board power station that mixes stored hydrogen with oxygen from the air, creating water and a small electric charge that is captured and used directly to propel the vehicle. Nothing harmful is emitted, aside from water vapor.
Now, according to British magazine Autocar, Audi will begin trials this August for a fuel-cell-powered A7, though, it is not the first manufacturer to have done so.
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