I did finally find out how to see how profitable each product as a whole is, but not a particular building. It seems like you should be able to click on a building and see how much money it makes, how much the expenses are (and what they are).
I didn’t play for too long so I didn’t start making anything complicated. At the early stages pollution is easy to handle by building a scrubber (or whatever its called) - feed it water and it removes pollution. I can imagine it starts getting more difficult as you get more and dirtier production.