Thanks, Asher. The paper mill, along with the Bomardier railcar factory (which was formerly an airplane factory that made Hurricanes in WW2), the tranportation railway and port are all continuing parts of Thunder Bay's industrial heritage. The smoke is not clean steam although considerably cleaner than when we arrived just over 20 years ago. In those days, the town stank downwind of the mill, which offered free carwashes to those living in its vicinity to clean off the white powder emitted. Our real estate agent called the stink "the smell of prosperity". It's also unsurprising that cancer rates were high among mill workers then, with the workers subject to frequent medical testing even now. So the picture might look pretty but cost lives in order for people to read their daily news in the New York Times, The Guardian, etc.
Cheers, Mike