But if I could, before that's handed over.... It's not an abstract question. It's applied science here. So in other words, when that fracturing takes place, what contribution does that make to the assumptions you can have about the geological formations? If I hear you correctly, you're saying that what you know of the science, the geology would say that the liquids will stay contained even following this. So with the chemicals—the 20% or 40% that are left in the ground and so on—we have good reason to believe they're going to stay there.
But I'm asking if there are specific studies that show this happens, that this actually is confirmed when the fracturing process and the other processes involved in the recovery of shale gas take place. Do those studies exist, first of all, and what do they say?