Race to the bottom
In the left's mind, there's this theoretical "race to the bottom", where the state (or country) with the least environmental services will be the most appealing to businesses -- as if every company aspires to destroy the environment and hire only employees who like to work in squalor until they die of cancer. But that's hokum to anyone who knows History, Sociology, or common sense.
The facts are that State's did most of the cleanup before there was even an FDA. And before that, most companies and communities had already been cleaning up, because no one wants to live in a toxic cesspool. So even without federal intervention (or international super-governments), things will get cleaner and better, because people care. And people buy based on what they care about.