the case for inhaled tobacco smoke causing cancer is undisputed in the scientific field. Not only associational, it's causal (IE, we can explain precisely how it works with full generalizable predictive ability). That's true also for C-VI in occupational situations where individuals are exposed to large amounts of inhaled material, but that is also associational, not causal. The reason PG&e did what they did is because it was cheaper to settle and pay off and move on.

In short, there is little to no convincing evidence that residents in Hinckley were harmed by PG&E's actions.