Mr. Speaker, I'm not sure what alternative option he's looking at. That is why we've hired a consultant to look at what is out there in terms of dust control. We know there's calcium, but some communities are quite concerned about how harmful it would be to the environment. There are other things such as what we're using on some of our airports. It's called EK-35. We've used it as dust suppressant on our airports. Most of the communities are quite happy with it. However, it's quite costly and we're not sure how corrosive it is, so we would need somebody to do an analysis of it and get back to us and also look at other options that we may have not seen or thought of at this point. That's what we're trying to accomplish with this study. Thank you.