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They are also building quite a bit of solar power. The obvious difference between actual coal trains and electric trains (even running on coal electricity), is that you don't need to change a thing in the trains themselves to reduce the emissions of the system. Certainly it would be nicer if India already generated their electricity carbon neutrally, but moving from coal powered electric trains to PV powered electric trains is so much easier than from diesel trains.

Sure, but most of Europe use electric and we generate a lot of our electricity from nuclear and hydro. By switching to electric India can change to other sources of electricity in the future.

Ah yes, I love Factorio.

underated comment.

It is in parallel to solar investments in station and on top of trains and along the tracks as well. My understanding is that they plan to go fully green.

Given the variations in solar generation and no mention of storage I am assuming it is equivalent green power to offset rather than actual used.