Of course, the oil sands are on the Athabasca River, which flows north to form the Slave River and the Great Slave Lake, and then to the Mackenzie River to the Arctic Ocean. The aquatic impacts are in that region.
The aquatic sampling program has been extensive in there. The one concern, of course, is the storage of water from the oil sands extraction process. The treatment of these ponds has been left to something in the future. It's crucial to ensure that they don't leak. Generally they don't leak, but sometimes they leak a bit. That's a great concern aquatically.
The other is the restoration of these lands. This is something that the Global Water Futures Programme did research on, working out how best to regrow the forest and reproduce the wetlands, including under drought conditions. We need deeper soils to do this. There's been tremendous expertise developed in how to restore the oil sands land to something more approximating a natural state.
The other concern you mentioned was the emissions in the atmosphere. Through airplane sampling, they picked up things that could not be picked up by existing sampling schemes on the ground. The sampling schemes need to improve for the atmosphere.
For the aquatic system, it's simpler because it's focused on the river. If we keep an eye on the river, which is being done very well, I think that can be contained, but it's crucial that a plan be developed to deal with the liquid waste from the oil sands over time, and not leave it for another half century.