Typically in our costing of any program we do not take into account the secondary impacts like the one you mention. The reason for that is that it's very difficult to actually measure those things and come up with an estimate that is reasonable and acceptable to everybody. That's why. Those kinds of health effects are extremely difficult to identify and measure. Because of that, we don't really go there, typically, so we can't really say that the estimate of $5 billion is accurate or reasonable or not. We don't really look at that at all.
On October 17th, 2017. See this statement in context.