Pollution, a documentary on water doping, manufacturers, including PSA, knew!

Patrick Lefrere is making a documentary, complete and very well done apparently, on the water doping in heat engines.

This documentary is the most neutral overview possible on the subject and it looks not bad at all, here is the trailer, we see, in particular, automotive engineers from PSA Peugeot:

Debate on forums: water doping, car manufacturers have known for a long time!

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