One thing is clear. You don't do it by getting rid of the agency that finally uncovered the truth, even if it did take way longer than it should have to prove.
Another thing is also clear hear. When profit is your primary motivator you tend to love localities in direct proportion to their powerlessness. And even if you have to spend capital to control local government it is an investment for the long term operating environment you desire the most.
Government may be pretty shity in doing right by us most of the time, but it is still better than nothing. And if we are unhappy with how often that "shity" happens may be it's time to take full responsible for ourselves. Take out all of the extraneous factors (which usually revolve around money) and just run things for our own benefit.
It can be done. All it takes is the will to make it happen, and a willingness to compromise in order to forge a consensus shared vision. No easy thing to do at all, but compared to suffering through more decades of sickness and lies?
Think about these things. Become better informed. Ask deeper questions. Take peaceful action.
For decades, people living next to the neoprene plant in St. John the Baptist Parish, Louisiana, have felt they suffered more than their share of illnesses. And sure enough, they had.