Snow and Ice on the way? Learn about de-icers

I mentioned the other day that one of the great environmental benefits of this mild winter is that there hasn't been much need for the use of de-icers. Most de-icing products contain high levels of salt, which can be detrimental to the environment. But with the prediction of snow and ice on the way, now may be a good time to think about the use of de-icers and how they affect our environment. What kind of de-icers do you use?

Here's a great document about chemical deicers and how they affect the Chesapeake Bay.