Based on time constraints, I didn't include in situ in my presentation today. I know you got a lot of information yesterday about groundwater concerns in situ from my former colleague, Mary Griffiths.
We often get asked if in situ is a more environmentally friendly way of doing oil sands than mining. It's a mixed bag. The greenhouse gas emissions are more significant with in situ than with mining. Although there is less water use on a per-barrel basis, we still have an underlying concern about the cumulative withdrawals from in situ projects. We can imagine having many straws in a milk shake, and we don't really know the size of what's available underground for those withdrawals.
We're also concerned about the disposal of in situ waste and the movement of that material underground in the subsurface channels. We need to do a lot more exploration around in situ oil sands development as well.