Hi swisstrains
They are quite noisy and polute the atmosphere quite a bit. This is why, on the line Paris (Gare de l'Est) to Troyes and eastwards, trains are brought out of Paris by an electric engine and then this is swapped for a deisel CC72000 series for the rest of the journey. Apparently, residents from Paris and the Eastern suburbs complained to SNCF.
Regards
Patrick
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