With tailings, of course, the technology evolves over time. As your process allows, you do improve as you go forward. Suncor is probably a good example to show this. Since the time of their inception there's been a very good step change going down; each time something comes along, they do apply it.
New projects such as ours employ the technology of the day. Carbon dioxide is available to us to do this because of the advances in technology, and that's going to help us with our tailings pond.
If new technology comes in and it's economically available, or if a process is available to bring it in--that's often a critical element, because the fundamentals of the process may or may not allow something--it comes into play.