This season on Richest Hill you’ve been hearing all about what mining meant for Butte, the toxic legacy it left behind, and about sprawling efforts to clean it up that have spanned more than 30 years.

Richest Hill Episode 07: The Possibilities Are Endless, And The Choice Is Ours

If you don’t know Butte Montana, you might have heard it’s one of the biggest toxic messes in the country. But now the “Mining City” is on the verge of sealing a deal that could clean it up once and for all. So how did we get here? What comes after Superfund? And who gets to decide?