 And there are other complications as well, the increasing and worrying presence of criminal gangs. Now, a lot of these illegal miners are working for the PCC. It's the first command of the capital. It's the biggest criminal gang in Brazil. So it's a lot easier to say that you're going to do than to do it. And it takes time. Leonardo Rocha is with the BBC. I'm David Brancaccio, Marketplace Morning Report. From APM American Public Media.