Hopefully, this addresses your question.
There are two sides to that. One side is that if you are looking at it in terms of per-barrel production, how much better is the industry doing versus overall gross impacts?
On per-barrel production, I can speak to oil sands. They are improving in terms of water use. In terms of air emissions, that's not my area of expertise, but, for example, Shell is instituting that carbon capture and storage on their upgrader.
For air contaminant releases, again they're trying to improve that, because it improves their economic side if they can get better at recovering the valuable things that also impact air quality.
In terms of the impact of water use on land, they are improving, but overall, because of the expansion of industry, the overall impact is increasing.