Take off the top instead of the bottom. I'm not sure that is possible, though, because the original shot did not have too much ground. Try to balance the train in the picture if you can, otherwise, try to do so in the camera next time. There was too much sky to start, and the second try made that worse. If you can crop it this way, I don't see any other reason it should be rejected. Lighting and everything else looks fine.
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