A good question to ask would be about the net balance in terms of pollution (accounting for the production of energy needed by the trains). I am quite curious and am wondering (don't worry, I am all in favour of trains). But that's probably too early to have data on this.
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Yes sir! I can see where your expertise will be needed but here no one cares for such investigation to deduce meaningful insight from the data else I would have wished to engage you in the future. Lol