No argument that this chemical is surely much less harmful than arsenic and that america is less polluted than Bangladesh.

And in practice it probably doesn't make sense for the individual in america to worry too much. There aren't really any places on earth you wouldn't have an effect from less dangerous/harder to diagnose chemicals.

But as a society we should still investigate it. A lot of small things summed together can add to something large.

For instance, why has fertility dropped so much? No one knows. Why are lab animals getting fatter? We don't know that either.

Slow burns are harder to sort out, but they can certainly exist.