The higher the weight and size of the engine the larger the fuel tank the faster the fuel is spent. We are in a time where artificial intelligence can do a full-fledged spolocnsot and I can't get rid of the old 74-tonne locomotives that burn hundreds of liters of fuel on one route.When they have the ELECTRIC trains that can be 320 km/h emission-free, it is very bad for me. Do they emit black dense smoke from the exhaust part and do not have to undergo any emission checks?