God I hate road salt. My poor poor Jeeps! Perhaps this will spur a shift towards alternatives? I've heard beet juice of all things is effective but I have no clue if its economical.
Chicago has used a kind of beet brine for deicing. It's beet juice mixed with salt. It means you can use less salt, the sugar makes it more effective in colder temps, and helps it stick to the road so there's less waste. Also makes the road look red.