The big producers would do it.
Its the small guys and the fly by night mom&pop producers who leave pure environmental carnage behind.
Why do you think the big producers will clean up when they aren't forced to do so? Is there a history of them doing that I am not aware of?
What gives you this impression? Take a gander at all the superfund sites in the States - they’re almost all caused by 1) the government or 2) large corporations. And neither of those entities made any efforts to clean up those sites until forced to.