What Provides A Quarter-Million Jobs And Is Literally Disappearing Before Our Eyes?

The first couple of times I watched the video below, I thought it was a satiric depiction of what the future might look like if we don't start to take care of this river (and others). But pay attention to the narration and you'll learn that this is already a reality. Now let's do something about it before it gets worse!

Heroes
True
Workonomics