But it's very important. I think you would agree that we do a net analysis on these kinds of things, and in areas reclaimed, the industry or the country should get credit for that reclamation. All of that is part of the terms and conditions of the environmental licences the companies operate under. I'll make the point that I was an environmental compliance officer in the oil sands, and I saw and administered first-hand the terms and conditions of environmental licences those industries operate under.
On page 4 of your report you described the cumulative effects on the Mackenzie basin. The Mackenzie River is a perfect example, and we have a lot of information on it. Back in the seventies, during the Berger commission years, a lot of fisheries and aquatic work was done on the Mackenzie River itself, and this was repeated in the late 1990s with the second iteration of the Mackenzie Valley pipeline. So you have two data sets about 25 years apart, and the second data set took place while oil sands development was ramping up.
Did you find any differences in the Mackenzie River water quality between the 1970s and the late 1990s that could be attributed to the oil sands?