I think you've hit it, Sean. At the end of the day, trains are great at reducing GHGs. With regard to loads going up, you can put a lot more on train than you can on a truck. Housing.... From an indigenous person's perspective, the ability to get snow machines, ATVs and those things that northerners rely on for their way of life is going to have a major impact on the north as well.
I'm more of a salt and vinegar fan.